Help-seeking by rural residents for mental health problems: The importance of agrarian values
- Judd, Fiona, Jackson, Henry, Komiti, Angela, Murray, Greg, Fraser, Caitlin, Grieve, Aaron, Gomez, Rapson
- Authors: Judd, Fiona , Jackson, Henry , Komiti, Angela , Murray, Greg , Fraser, Caitlin , Grieve, Aaron , Gomez, Rapson
- Date: 2006
- Type: Text , Journal article
- Relation: Australian and New Zealand Journal of Psychiatry Vol. 40, no. 9 (2006), p. 769-776
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- Description: Objective: To examine the role of stoicism, self-efficacy and perceived stigma in predicting help-seeking by rural residents, for mental health problems. Method: A cross-sectional community survey was conducted with a sample of 467 rural residents (58% female), who completed self-report questionnaires assessing current levels of symptomatology, disability, perceived stigma, self-efficacy, stoicism, attitudes towards and experience of seeking help for psychological problems. Results: Overall, 7.6% (n = 129) of respondents had sought help from a general practitioner and/or mental health professional for psychological problems or a mental health issue. More women than men reported having sought such help. Lifetime help-seeking for a psychological problem or mental health issue was positively associated with higher levels of distress and lower levels of stoicism and, to a lesser extent, lower levels of self-efficacy. Conclusions: Efforts to improve help-seeking by rural residents for mental health problems should focus on understanding and addressing attitudes, such as stoicism which act as barriers to help-seeking. © 2006 The Authors; Journal compilation © 2006 The Royal Australian and New Zealand College of Psychiatrists.
- Description: C1
- Description: 2003002045
- Authors: Judd, Fiona , Jackson, Henry , Komiti, Angela , Murray, Greg , Fraser, Caitlin , Grieve, Aaron , Gomez, Rapson
- Date: 2006
- Type: Text , Journal article
- Relation: Australian and New Zealand Journal of Psychiatry Vol. 40, no. 9 (2006), p. 769-776
- Full Text:
- Reviewed:
- Description: Objective: To examine the role of stoicism, self-efficacy and perceived stigma in predicting help-seeking by rural residents, for mental health problems. Method: A cross-sectional community survey was conducted with a sample of 467 rural residents (58% female), who completed self-report questionnaires assessing current levels of symptomatology, disability, perceived stigma, self-efficacy, stoicism, attitudes towards and experience of seeking help for psychological problems. Results: Overall, 7.6% (n = 129) of respondents had sought help from a general practitioner and/or mental health professional for psychological problems or a mental health issue. More women than men reported having sought such help. Lifetime help-seeking for a psychological problem or mental health issue was positively associated with higher levels of distress and lower levels of stoicism and, to a lesser extent, lower levels of self-efficacy. Conclusions: Efforts to improve help-seeking by rural residents for mental health problems should focus on understanding and addressing attitudes, such as stoicism which act as barriers to help-seeking. © 2006 The Authors; Journal compilation © 2006 The Royal Australian and New Zealand College of Psychiatrists.
- Description: C1
- Description: 2003002045
Item response theory analysis of the spiritual well-being questionnaire
- Authors: Gomez, Rapson , Fisher, John
- Date: 2005
- Type: Text , Journal article
- Relation: Personality and Individual Differences Vol. 38, no. 5 (2005), p. 1107-1121
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- Description: Recently, Gomez and Fisher (2003) published the Spiritual Well-Being Questionnaire (SWBQ). This is a self-rating measure with separate 5-item scales for personal, communal, environmental, and transcendental spiritual well-being. This study used item response theory (IRT) to examine the psychometric properties of these scales. A sample comprising 4462 participants from mainly secondary schools and universities completed the SWBQ. Samejima's graded response model was used for the analyses. The results showed that the discrimination parameters for all items in the four scales were moderate to large. The threshold parameters showed adequate representation of the relevant traits from low to the mean trait level for personal, communal and environmental items, and from low to moderately high trait level for the transcendental items. With the exception of five items, all other items showed good item information function values, and therefore acceptable reliability. The findings also indicated that the number of response options could be decreased and increased at the low and high trait levels, respectively. Thus while there was general support for the psychometric properties of the SWBQ from an IRT perspective, there were also indications that this measure can be further improved. © 2004 Published by Elsevier Ltd.
- Description: C1
- Description: 2003001243
- Authors: Gomez, Rapson , Fisher, John
- Date: 2005
- Type: Text , Journal article
- Relation: Personality and Individual Differences Vol. 38, no. 5 (2005), p. 1107-1121
- Full Text:
- Reviewed:
- Description: Recently, Gomez and Fisher (2003) published the Spiritual Well-Being Questionnaire (SWBQ). This is a self-rating measure with separate 5-item scales for personal, communal, environmental, and transcendental spiritual well-being. This study used item response theory (IRT) to examine the psychometric properties of these scales. A sample comprising 4462 participants from mainly secondary schools and universities completed the SWBQ. Samejima's graded response model was used for the analyses. The results showed that the discrimination parameters for all items in the four scales were moderate to large. The threshold parameters showed adequate representation of the relevant traits from low to the mean trait level for personal, communal and environmental items, and from low to moderately high trait level for the transcendental items. With the exception of five items, all other items showed good item information function values, and therefore acceptable reliability. The findings also indicated that the number of response options could be decreased and increased at the low and high trait levels, respectively. Thus while there was general support for the psychometric properties of the SWBQ from an IRT perspective, there were also indications that this measure can be further improved. © 2004 Published by Elsevier Ltd.
- Description: C1
- Description: 2003001243
Domains of spiritual well-being and development and validation of the spiritual well-being questionnaire
- Authors: Gomez, Rapson , Fisher, John
- Date: 2003
- Type: Text , Journal article
- Relation: Personality and Individual Differences Vol. 35, no. 8 (2003), p. 1975-1991
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- Description: Fisher (1998) proposed a spiritual well-being model, comprising the domains of personal, communal, environmental and transcendental well-being, and a single global spiritual well-being dimension. This paper reports on four studies aimed at testing Fisher's theoretical model, and establishing the validity and reliability of a new self-rating questionnaire (Spiritual Well-Being Questionnaire; SWBQ), developed to reflect this model. All four studies supported Fisher's model. The SWBQ showed good reliability (Cronbach's alpha, composite reliability and variance extracted), and validity (construct, concurrent, discriminant, predictive and factorial independence from personality). The SWBQ has the advantage over other existing spiritual well-being measures in that it is based on a broader and more empirically based conceptualization of spiritual well-being, and has well established psychometric properties. © 2003 Elsevier Ltd. All rights reserved.
- Description: C1
- Description: 2003000503
- Authors: Gomez, Rapson , Fisher, John
- Date: 2003
- Type: Text , Journal article
- Relation: Personality and Individual Differences Vol. 35, no. 8 (2003), p. 1975-1991
- Full Text:
- Reviewed:
- Description: Fisher (1998) proposed a spiritual well-being model, comprising the domains of personal, communal, environmental and transcendental well-being, and a single global spiritual well-being dimension. This paper reports on four studies aimed at testing Fisher's theoretical model, and establishing the validity and reliability of a new self-rating questionnaire (Spiritual Well-Being Questionnaire; SWBQ), developed to reflect this model. All four studies supported Fisher's model. The SWBQ showed good reliability (Cronbach's alpha, composite reliability and variance extracted), and validity (construct, concurrent, discriminant, predictive and factorial independence from personality). The SWBQ has the advantage over other existing spiritual well-being measures in that it is based on a broader and more empirically based conceptualization of spiritual well-being, and has well established psychometric properties. © 2003 Elsevier Ltd. All rights reserved.
- Description: C1
- Description: 2003000503
The association of avoidance coping style, and perceived mother and father support with anxiety/depression among late adolescents : Applicability of resiliency models
- Gomez, Rapson, McLaren, Suzanne
- Authors: Gomez, Rapson , McLaren, Suzanne
- Date: 2006
- Type: Text , Journal article
- Relation: Personality and Individual Differences Vol. 40, no. 6 (2006), p. 1165-1176
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- Description: This study examined the applicability of the compensatory, the risk-protective, the challenge, and the protective-protective models of resiliency for the prediction of anxiety/depression from avoidance coping style (the risk factor) and perceived mother and father support (the protective factors). A total of 331 participants, with age ranging from 18 to 20 years, completed self-rating questionnaires covering perceived mother support, perceived father support, avoidance coping style, and anxiety/depression. Results showed that for perceived mother support as the protective factor, there was support for the compensatory, the risk-protective, and the challenge models. With perceived father support as the protective factor, there was support for the compensatory and challenge models. When both perceived mother and father support were considered together, there was support for the protective-protective model. © 2005 Published by Elsevier Ltd.
- Description: C1
- Description: 2003002027
- Authors: Gomez, Rapson , McLaren, Suzanne
- Date: 2006
- Type: Text , Journal article
- Relation: Personality and Individual Differences Vol. 40, no. 6 (2006), p. 1165-1176
- Full Text:
- Reviewed:
- Description: This study examined the applicability of the compensatory, the risk-protective, the challenge, and the protective-protective models of resiliency for the prediction of anxiety/depression from avoidance coping style (the risk factor) and perceived mother and father support (the protective factors). A total of 331 participants, with age ranging from 18 to 20 years, completed self-rating questionnaires covering perceived mother support, perceived father support, avoidance coping style, and anxiety/depression. Results showed that for perceived mother support as the protective factor, there was support for the compensatory, the risk-protective, and the challenge models. With perceived father support as the protective factor, there was support for the compensatory and challenge models. When both perceived mother and father support were considered together, there was support for the protective-protective model. © 2005 Published by Elsevier Ltd.
- Description: C1
- Description: 2003002027
Teacher ratings of ODD symptoms: Measurement equivalence across Malaysian Malay, Chinese and Indian children
- Authors: Gomez, Rapson
- Date: 2014
- Type: Text , Journal article
- Relation: Asian Journal of Psychiatry Vol. 8, no. 1 (2014), p. 52-55
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- Description: Background The study examined the measurement equivalence for teacher ratings across Malaysian Malay, Chinese and Indian children. Methods Malaysian teachers completed ratings of the ODD symptoms for 574 Malay, 247 Chinese and 98 Indian children. Results The results supported the equivalences for the configural, metric, and error variances models, and the equivalences for ODD latent variances and mean scores. Discussion Together, these findings suggest good support for measurement and structural equivalences of the ODD symptoms across these ethnic groups. The theoretical and clinical implications of the findings for cross-cultural equivalence of the ODD symptoms are discussed.
- Authors: Gomez, Rapson
- Date: 2014
- Type: Text , Journal article
- Relation: Asian Journal of Psychiatry Vol. 8, no. 1 (2014), p. 52-55
- Full Text:
- Description: Background The study examined the measurement equivalence for teacher ratings across Malaysian Malay, Chinese and Indian children. Methods Malaysian teachers completed ratings of the ODD symptoms for 574 Malay, 247 Chinese and 98 Indian children. Results The results supported the equivalences for the configural, metric, and error variances models, and the equivalences for ODD latent variances and mean scores. Discussion Together, these findings suggest good support for measurement and structural equivalences of the ODD symptoms across these ethnic groups. The theoretical and clinical implications of the findings for cross-cultural equivalence of the ODD symptoms are discussed.
The spiritual well-being questionnaire : Testing for model applicability, measurement and structural equivalencies, and latent mean differences across gender
- Authors: Gomez, Rapson , Fisher, John
- Date: 2005
- Type: Text , Journal article
- Relation: Personality and Individual Differences Vol. 39, no. 8 (2005), p. 1383-1393
- Full Text:
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- Description: Fisher (1998) proposed a spiritual well-being model, comprising primary factors for the domains of personal, communal, environmental and transcendental well-being, that cohere to form a single higher order or global spiritual well-being dimension. In line with this model, Gomez and Fisher (2003) published the Spiritual Well-Being Questionnaire (SWBQ), with scales for measuring personal, communal, environmental and transcendental spiritual well-being. This study used multi-group confirmatory factor analysis (CFA) to examine gender equivalencies of the measurement and structural models of the SWBQ, and the latent mean in the four SWBQ factors. A total of 3101 females and 1361 males, with age ranging from 15 to 32 years, completed the SWBQ. The statistical fit results supported the invariance of the measurement model, and some aspects of the structural model. The practical fit indices results provided support for the invariance of both the measurement and structural models. The results also showed little gender differences. Together, these findings support gender equivalencies for the SWBQ. © 2005 Published by Elsevier Ltd.
- Description: C1
- Authors: Gomez, Rapson , Fisher, John
- Date: 2005
- Type: Text , Journal article
- Relation: Personality and Individual Differences Vol. 39, no. 8 (2005), p. 1383-1393
- Full Text:
- Reviewed:
- Description: Fisher (1998) proposed a spiritual well-being model, comprising primary factors for the domains of personal, communal, environmental and transcendental well-being, that cohere to form a single higher order or global spiritual well-being dimension. In line with this model, Gomez and Fisher (2003) published the Spiritual Well-Being Questionnaire (SWBQ), with scales for measuring personal, communal, environmental and transcendental spiritual well-being. This study used multi-group confirmatory factor analysis (CFA) to examine gender equivalencies of the measurement and structural models of the SWBQ, and the latent mean in the four SWBQ factors. A total of 3101 females and 1361 males, with age ranging from 15 to 32 years, completed the SWBQ. The statistical fit results supported the invariance of the measurement model, and some aspects of the structural model. The practical fit indices results provided support for the invariance of both the measurement and structural models. The results also showed little gender differences. Together, these findings support gender equivalencies for the SWBQ. © 2005 Published by Elsevier Ltd.
- Description: C1
Marital status and suicidal ideation among Australian older adults: the mediating role of sense of belonging
- McLaren, Suzanne, Gomez, Rapson, Gill, Peter, Chester, Jessica
- Authors: McLaren, Suzanne , Gomez, Rapson , Gill, Peter , Chester, Jessica
- Date: 2014
- Type: Text , Journal article
- Relation: International Psychogeriatrics Vol. 27, no. 1 (2014), p. 145-154
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- Description: Marriage has been identified as a protective factor in relation to suicide among older adults. The current study aimed to investigate whether sense of belonging mediated the marital status-suicidal ideation relationship, and whether gender moderated the mediation model. It was hypothesized that the relationship between being widowed and lower levels of sense of belonging, and between lower levels of belonging and higher levels of suicidal ideation, would be stronger for older men than older women. A community sample of Australian men (n = 286) and women (n = 383) aged from 65 to 98 years completed the psychological subscale of the Sense of Belonging Instrument and the suicide subscale of the General Health Questionnaire. The results supported the moderated mediation model, with gender influencing the marital status-sense of belonging relation. For men, widowhood was associated with lower levels of belongingness, whereas for women, marital status was unrelated to sense of belonging. It would appear crucial to develop and implement interventions which assist older men to find new ways to feel important and valued after the death of their spouse.
- Authors: McLaren, Suzanne , Gomez, Rapson , Gill, Peter , Chester, Jessica
- Date: 2014
- Type: Text , Journal article
- Relation: International Psychogeriatrics Vol. 27, no. 1 (2014), p. 145-154
- Full Text:
- Reviewed:
- Description: Marriage has been identified as a protective factor in relation to suicide among older adults. The current study aimed to investigate whether sense of belonging mediated the marital status-suicidal ideation relationship, and whether gender moderated the mediation model. It was hypothesized that the relationship between being widowed and lower levels of sense of belonging, and between lower levels of belonging and higher levels of suicidal ideation, would be stronger for older men than older women. A community sample of Australian men (n = 286) and women (n = 383) aged from 65 to 98 years completed the psychological subscale of the Sense of Belonging Instrument and the suicide subscale of the General Health Questionnaire. The results supported the moderated mediation model, with gender influencing the marital status-sense of belonging relation. For men, widowhood was associated with lower levels of belongingness, whereas for women, marital status was unrelated to sense of belonging. It would appear crucial to develop and implement interventions which assist older men to find new ways to feel important and valued after the death of their spouse.
Item response theory analysis of the recoded Internet Gaming Disorder Scale-Short-Form (IGDS9-SF)
- Gomez, Rapson, Stavropoulos, Vasileios, Beard, Charlotte, Pontes, Halley
- Authors: Gomez, Rapson , Stavropoulos, Vasileios , Beard, Charlotte , Pontes, Halley
- Date: 2019
- Type: Text , Journal article
- Relation: International Journal of Mental Health and Addiction Vol. 17, no. 4 (2019), p. 859-879
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- Description: Based on the nine criteria for Internet gaming disorder (IGD) in DSM-5, the Internet Gaming Disorder Scale 9-Short Form (IGDS9-SF; Pontes and Griffiths 2015) is the most widely used questionnaire for assessing IGD. The present study examined support for the unidimensional factor structure of the instrument, with a group of 868 adolescent and adult gamers from the USA, with criteria recoded as present or absent. The two-parameter logistic model (2PLM) was used to examine the item response theory properties of the criteria included in the measure. Confirmatory factor analysis supported the one-factor model. The 2PLM analysis indicated that all the criteria were strong discriminators of high and low latent IGD. Furthermore, the items measured more of the GAD dimension and with more precision from around +2 SD from the mean trait level. The implications of the findings for interpreting the IGDS9-SF scores for clinical practice are discussed.
- Authors: Gomez, Rapson , Stavropoulos, Vasileios , Beard, Charlotte , Pontes, Halley
- Date: 2019
- Type: Text , Journal article
- Relation: International Journal of Mental Health and Addiction Vol. 17, no. 4 (2019), p. 859-879
- Full Text:
- Reviewed:
- Description: Based on the nine criteria for Internet gaming disorder (IGD) in DSM-5, the Internet Gaming Disorder Scale 9-Short Form (IGDS9-SF; Pontes and Griffiths 2015) is the most widely used questionnaire for assessing IGD. The present study examined support for the unidimensional factor structure of the instrument, with a group of 868 adolescent and adult gamers from the USA, with criteria recoded as present or absent. The two-parameter logistic model (2PLM) was used to examine the item response theory properties of the criteria included in the measure. Confirmatory factor analysis supported the one-factor model. The 2PLM analysis indicated that all the criteria were strong discriminators of high and low latent IGD. Furthermore, the items measured more of the GAD dimension and with more precision from around +2 SD from the mean trait level. The implications of the findings for interpreting the IGDS9-SF scores for clinical practice are discussed.
Exercise, mood, self-efficacy, and social support as predictors of depressive symptoms in older adults : Direct and interaction effects
- Miller, Kyle, Mesagno, Christopher, McLaren, Suzanne, Grace, Fergal, Yates, Mark, Gomez, Rapson
- Authors: Miller, Kyle , Mesagno, Christopher , McLaren, Suzanne , Grace, Fergal , Yates, Mark , Gomez, Rapson
- Date: 2019
- Type: Text , Journal article
- Relation: Frontiers in Psychology Vol. 10, no. (2019), p. 1-11
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- Description: Background: Depression is a chronic condition that affects up to 15% of older adults. The healthogenic effects of regular exercise are well established, but it is still unclear which exercise-related variables characterise the antidepressant effects of exercise. Thus, the purpose of this study was to examine the extent to which exercise-related variables (exercise behaviour, exercise-induced mood, exercise self-efficacy, and social support) can predict depressive symptoms in a cohort of community-dwelling older adults. Methods: This study employed a cross-sectional analysis of questionnaire data from a sample of 586 community-dwelling older Australians aged 65 to 96 years old. Participants completed the Center for Epidemiologic Studies Depression Scale, modified CHAMPS Physical Activity Questionnaire for Older Adults, Four-Dimension Mood Scale, Self-Efficacy for Exercise Scale, and Social Provisions Scale - Short Form. Bivariate correlations were performed, and hierarchical multiple regression was subsequently used to test the regression model. Results: Exercise behaviour, exercise-induced mood, exercise self-efficacy, and social support were all negatively associated with depressive symptoms (r = -0.20 to -0.56). When the variables were entered as predictors into the hierarchical multiple regression model, social support was the strongest predictor of depressive symptoms (beta = -0.42), followed by exercise-induced mood (beta = -0.23), and exercise self-efficacy (beta = -0.07). Exercise behaviour did not explain any additional variance in depressive symptoms. A modest interaction effect was also observed between exercise-induced mood and social support. Conclusion: These findings indicate that social support is the strongest predictor of depressive symptomology in community-dwelling older adults, particularly when combined with positive exercise-induced mood states. When addressing the needs of older adults at risk of depression, healthcare professionals should consider the implementation of exercise programmes that are likely to benefit older adults by improving mood, enhancing self-efficacy, and building social support.
- Authors: Miller, Kyle , Mesagno, Christopher , McLaren, Suzanne , Grace, Fergal , Yates, Mark , Gomez, Rapson
- Date: 2019
- Type: Text , Journal article
- Relation: Frontiers in Psychology Vol. 10, no. (2019), p. 1-11
- Full Text:
- Reviewed:
- Description: Background: Depression is a chronic condition that affects up to 15% of older adults. The healthogenic effects of regular exercise are well established, but it is still unclear which exercise-related variables characterise the antidepressant effects of exercise. Thus, the purpose of this study was to examine the extent to which exercise-related variables (exercise behaviour, exercise-induced mood, exercise self-efficacy, and social support) can predict depressive symptoms in a cohort of community-dwelling older adults. Methods: This study employed a cross-sectional analysis of questionnaire data from a sample of 586 community-dwelling older Australians aged 65 to 96 years old. Participants completed the Center for Epidemiologic Studies Depression Scale, modified CHAMPS Physical Activity Questionnaire for Older Adults, Four-Dimension Mood Scale, Self-Efficacy for Exercise Scale, and Social Provisions Scale - Short Form. Bivariate correlations were performed, and hierarchical multiple regression was subsequently used to test the regression model. Results: Exercise behaviour, exercise-induced mood, exercise self-efficacy, and social support were all negatively associated with depressive symptoms (r = -0.20 to -0.56). When the variables were entered as predictors into the hierarchical multiple regression model, social support was the strongest predictor of depressive symptoms (beta = -0.42), followed by exercise-induced mood (beta = -0.23), and exercise self-efficacy (beta = -0.07). Exercise behaviour did not explain any additional variance in depressive symptoms. A modest interaction effect was also observed between exercise-induced mood and social support. Conclusion: These findings indicate that social support is the strongest predictor of depressive symptomology in community-dwelling older adults, particularly when combined with positive exercise-induced mood states. When addressing the needs of older adults at risk of depression, healthcare professionals should consider the implementation of exercise programmes that are likely to benefit older adults by improving mood, enhancing self-efficacy, and building social support.
Measurement invariance of the Internet Gaming Disorder Scale-Short-Form (IGDS9-SF) between Australia, the USA, and the UK
- Stavropoulos, Vasileios, Beard, Charlotte, Griffiths, Mark, Buleigh, Tyrone, Gomez, Rapson, Pontes, Halley
- Authors: Stavropoulos, Vasileios , Beard, Charlotte , Griffiths, Mark , Buleigh, Tyrone , Gomez, Rapson , Pontes, Halley
- Date: 2018
- Type: Text , Journal article
- Relation: International Journal of Mental Health and Addiction Vol. 16, no. 2 (2018), p. 377-392
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- Description: The Internet Gaming Disorder Scale–Short-Form (IGDS9-SF) is widely used to assess Internet Gaming Disorder behaviors. Investigating cultural limitations and implications in its applicability is imperative. One way to evaluate the cross-cultural feasibility of the measure is through measurement invariance analysis. The present study used Multigroup Confirmatory Factor Analysis (MGCFA) to examine the IGDS9-SF measurement invariance across gamers from Australia, the United States of America (USA), and the United Kingdom (UK). To accomplish this, 171 Australian, 463 USA, and 281 UK gamers completed the IGDS9-SF. Although results supported the one-factor structure of the IGD construct, they indicated cross-country variations in the strength of the relationships between the indicators and their respective factor (i.e., non-invariant loadings of items 1, 2, 5), and that the same scores may not always indicate the same level of IGD severity across the three groups (i.e., non-invariant intercepts for items 1, 5, 7, 9).
- Authors: Stavropoulos, Vasileios , Beard, Charlotte , Griffiths, Mark , Buleigh, Tyrone , Gomez, Rapson , Pontes, Halley
- Date: 2018
- Type: Text , Journal article
- Relation: International Journal of Mental Health and Addiction Vol. 16, no. 2 (2018), p. 377-392
- Full Text:
- Reviewed:
- Description: The Internet Gaming Disorder Scale–Short-Form (IGDS9-SF) is widely used to assess Internet Gaming Disorder behaviors. Investigating cultural limitations and implications in its applicability is imperative. One way to evaluate the cross-cultural feasibility of the measure is through measurement invariance analysis. The present study used Multigroup Confirmatory Factor Analysis (MGCFA) to examine the IGDS9-SF measurement invariance across gamers from Australia, the United States of America (USA), and the United Kingdom (UK). To accomplish this, 171 Australian, 463 USA, and 281 UK gamers completed the IGDS9-SF. Although results supported the one-factor structure of the IGD construct, they indicated cross-country variations in the strength of the relationships between the indicators and their respective factor (i.e., non-invariant loadings of items 1, 2, 5), and that the same scores may not always indicate the same level of IGD severity across the three groups (i.e., non-invariant intercepts for items 1, 5, 7, 9).
Factor structure of teacher ratings of the ODD symptoms in children
- Gomez, Rapson, Stavropoulos, Vasileios, Van Doorn, George
- Authors: Gomez, Rapson , Stavropoulos, Vasileios , Van Doorn, George
- Date: 2018
- Type: Text , Journal article
- Relation: Psychiatric Quarterly Vol. 89, no. 1 (2018), p. 219-234
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- Description: This study used confirmatory factor analysis (CFA) to determine the best model for Oppositional Defiant Disorder (ODD) symptoms in children aged 3 to 15 years, as presented in the Disruptive Behavior Rating Scale. Teachers’ ratings of the ODD symptoms of 213 children from general community schools in Australia were obtained. The findings provided most support for a bifactor model based on Stringaris and Goodman’s [1] three-factor model (primary factors for irritable, hurtful, and headstrong). The general factor, but not the group factors in the model, showed high omega hierarchical and explained common variance. Thus, only the general factor in this model can be meaningfully interpreted. Also, the general factor was supported with regard to external validity. Specifically, this factor, but not the group factors, correlated strongly with ADHD inattention and hyperactivity/impulsivity symptom groups, and other measures of behavioural and emotional problems. The taxonomic, diagnostic, practical, and research implications of the findings are discussed. © 2017, Springer Science+Business Media, LLC.
- Authors: Gomez, Rapson , Stavropoulos, Vasileios , Van Doorn, George
- Date: 2018
- Type: Text , Journal article
- Relation: Psychiatric Quarterly Vol. 89, no. 1 (2018), p. 219-234
- Full Text:
- Reviewed:
- Description: This study used confirmatory factor analysis (CFA) to determine the best model for Oppositional Defiant Disorder (ODD) symptoms in children aged 3 to 15 years, as presented in the Disruptive Behavior Rating Scale. Teachers’ ratings of the ODD symptoms of 213 children from general community schools in Australia were obtained. The findings provided most support for a bifactor model based on Stringaris and Goodman’s [1] three-factor model (primary factors for irritable, hurtful, and headstrong). The general factor, but not the group factors in the model, showed high omega hierarchical and explained common variance. Thus, only the general factor in this model can be meaningfully interpreted. Also, the general factor was supported with regard to external validity. Specifically, this factor, but not the group factors, correlated strongly with ADHD inattention and hyperactivity/impulsivity symptom groups, and other measures of behavioural and emotional problems. The taxonomic, diagnostic, practical, and research implications of the findings are discussed. © 2017, Springer Science+Business Media, LLC.
The longitudinal association between anxiety and Internet addiction in adolescence : The moderating effect of classroom extraversion
- Stavropoulos, Vasileios, Gomez, Rapson, Steen, Eloisa, Beard, Charlotte, Liew, Lucas, Griffiths, Mark
- Authors: Stavropoulos, Vasileios , Gomez, Rapson , Steen, Eloisa , Beard, Charlotte , Liew, Lucas , Griffiths, Mark
- Date: 2017
- Type: Text , Journal article
- Relation: Journal of Behavioral Addictions Vol. 6, no. 2 (2017), p. 237-247
- Full Text:
- Reviewed:
- Description: Background and aims The risk effect of anxiety on addictive behaviors, including Internet addiction (IA), has repeatedly been highlighted in the international literature. However, there is a lack of longitudinal studies examining this association in relation to proximal context effects, particularly in adolescence. Such findings would shed light on potential age- and proximal context-related variations in the anxiety-IA association that could better inform IA prevention and intervention initiatives. Methods In this study, 648 adolescents, embedded in 34 classrooms, were assessed at the age of 16 and again at the age of 18 to examine the effect of anxiety on IA behaviors in relation to the average level of classroom extraversion. IA was assessed with the Internet Addiction Test (Young, 1998), anxiety with the relevant subscale of the Symptom Checklist 90 - Revised (Derogatis & Savitz, 1999) and classroom extraversion with the synonymous subscale of the Five Factor Questionnaire (Asendorpf & van Aken, 2003). A three-level hierarchical linear model was calculated. Results The present findings demonstrated that: (a) higher levels of anxiety were significantly associated with higher IA behaviors, (b) the strength of this association did not vary over time (between 16 and 18 years old), and (c) however, it tended to weaken within classrooms higher in extraversion. Discussion This study indicated that the contribution of individual IA risk factors might differently unfold within different contexts.
- Authors: Stavropoulos, Vasileios , Gomez, Rapson , Steen, Eloisa , Beard, Charlotte , Liew, Lucas , Griffiths, Mark
- Date: 2017
- Type: Text , Journal article
- Relation: Journal of Behavioral Addictions Vol. 6, no. 2 (2017), p. 237-247
- Full Text:
- Reviewed:
- Description: Background and aims The risk effect of anxiety on addictive behaviors, including Internet addiction (IA), has repeatedly been highlighted in the international literature. However, there is a lack of longitudinal studies examining this association in relation to proximal context effects, particularly in adolescence. Such findings would shed light on potential age- and proximal context-related variations in the anxiety-IA association that could better inform IA prevention and intervention initiatives. Methods In this study, 648 adolescents, embedded in 34 classrooms, were assessed at the age of 16 and again at the age of 18 to examine the effect of anxiety on IA behaviors in relation to the average level of classroom extraversion. IA was assessed with the Internet Addiction Test (Young, 1998), anxiety with the relevant subscale of the Symptom Checklist 90 - Revised (Derogatis & Savitz, 1999) and classroom extraversion with the synonymous subscale of the Five Factor Questionnaire (Asendorpf & van Aken, 2003). A three-level hierarchical linear model was calculated. Results The present findings demonstrated that: (a) higher levels of anxiety were significantly associated with higher IA behaviors, (b) the strength of this association did not vary over time (between 16 and 18 years old), and (c) however, it tended to weaken within classrooms higher in extraversion. Discussion This study indicated that the contribution of individual IA risk factors might differently unfold within different contexts.
Structure of the Wechsler intelligence scale for children - Fourth edition in a group of children with ADHD
- Gomez, Rapson, Vance, Alasdair, Watson, Shaun
- Authors: Gomez, Rapson , Vance, Alasdair , Watson, Shaun
- Date: 2016
- Type: Text , Journal article
- Relation: Frontiers in Psychology Vol. 7, no. MAY (2016), p. 1-11
- Full Text:
- Reviewed:
- Description: Objective: This study used confirmatory factor analysis to examine the factor structure for the 10 core WISC-IV subtests in a group of children (N = 812) with ADHD. Method: The study examined oblique four- and five-factor models, higher order models with one general secondary factor and four and five primary factors, and a bifactor model with a general factor and four specific factors. Results: The findings supported all models tested, with the bifactor model being the optimum model. For this model, only the general factor had high explained common variance and omega hierarchical value, and it predicted reading and arithmetic abilities. Conclusion: The findings favor the use of the FSIQ scores of the WISC-IV, but not the subscale index scores. © 2016 Gomez, Vance and Watson.
- Authors: Gomez, Rapson , Vance, Alasdair , Watson, Shaun
- Date: 2016
- Type: Text , Journal article
- Relation: Frontiers in Psychology Vol. 7, no. MAY (2016), p. 1-11
- Full Text:
- Reviewed:
- Description: Objective: This study used confirmatory factor analysis to examine the factor structure for the 10 core WISC-IV subtests in a group of children (N = 812) with ADHD. Method: The study examined oblique four- and five-factor models, higher order models with one general secondary factor and four and five primary factors, and a bifactor model with a general factor and four specific factors. Results: The findings supported all models tested, with the bifactor model being the optimum model. For this model, only the general factor had high explained common variance and omega hierarchical value, and it predicted reading and arithmetic abilities. Conclusion: The findings favor the use of the FSIQ scores of the WISC-IV, but not the subscale index scores. © 2016 Gomez, Vance and Watson.
Confirmatory factor analysis of the combined social phobia scale and social interaction anxiety scale : Support for a bifactor model
- Gomez, Rapson, Watson, Shaun
- Authors: Gomez, Rapson , Watson, Shaun
- Date: 2017
- Type: Text , Journal article
- Relation: Frontiers in Psychology Vol. 8, no. (2017), p. 1-13
- Full Text:
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- Description: For the Social Phobia Scale (SPS) and the Social Interaction Anxiety Scale (SIAS) together, this study examined support for a bifactor model, and also the internal consistency reliability and external validity of the factors in this model. Participants (N = 526) were adults from the general community who completed the SPS and SIAS. Confirmatory factor analysis (CFA) of their ratings indicated good support for the bifactor model. For this model, the loadings for all but six items were higher on the general factor than the specific factors. The three positively worded items had negligible loadings on the general factor. The general factor explained most of the common variance in the SPS and SIAS, and demonstrated good model-based internal consistency reliability (omega hierarchical) and a strong association with fear of negative evaluation and extraversion. The practical implications of the findings for the utilization of the SPS and SIAS, and the theoretical and clinical implications for social anxiety are discussed. © 2017 Gomez and Watson.
- Authors: Gomez, Rapson , Watson, Shaun
- Date: 2017
- Type: Text , Journal article
- Relation: Frontiers in Psychology Vol. 8, no. (2017), p. 1-13
- Full Text:
- Reviewed:
- Description: For the Social Phobia Scale (SPS) and the Social Interaction Anxiety Scale (SIAS) together, this study examined support for a bifactor model, and also the internal consistency reliability and external validity of the factors in this model. Participants (N = 526) were adults from the general community who completed the SPS and SIAS. Confirmatory factor analysis (CFA) of their ratings indicated good support for the bifactor model. For this model, the loadings for all but six items were higher on the general factor than the specific factors. The three positively worded items had negligible loadings on the general factor. The general factor explained most of the common variance in the SPS and SIAS, and demonstrated good model-based internal consistency reliability (omega hierarchical) and a strong association with fear of negative evaluation and extraversion. The practical implications of the findings for the utilization of the SPS and SIAS, and the theoretical and clinical implications for social anxiety are discussed. © 2017 Gomez and Watson.
Duration-dependent effects of the BDNF Val66Met polymorphism on anodal tDCS induced motor cortex plasticity in older adults : A group and individual perspective
- Puri, Rohan, Hinder, Mark, Fujiyama, Hakuei, Gomez, Rapson, Carson, Richard, Summers, Jeff
- Authors: Puri, Rohan , Hinder, Mark , Fujiyama, Hakuei , Gomez, Rapson , Carson, Richard , Summers, Jeff
- Date: 2015
- Type: Text , Journal article
- Relation: Frontiers in Aging Neuroscience Vol. 7, no. JUN (2015), p. 1-10
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- Description: The brain derived neurotrophic factor (BDNF) Val66Met polymorphism and stimulation duration are thought to play an important role in modulating motor cortex plasticity induced by non-invasive brain stimulation (NBS). In the present study we sought to determine whether these factors interact or exert independent effects in older adults. Fifty-four healthy older adults (mean age = 66.85 years) underwent two counterbalanced sessions of 1.5 mA anodal transcranial direct current stimulation (atDCS), applied over left M1 for either 10 or 20 min. Single pulse transcranial magnetic stimulation (TMS) was used to assess corticospinal excitability (CSE) before and every 5 min for 30 min following atDCS. On a group level, there was an interaction between stimulation duration and BDNF genotype, with Met carriers (n = 13) showing greater post-intervention potentiation of CSE compared to Val66Val homozygotes homozygotes (n = 37) following 20 min (p = 0.002) but not 10 min (p = 0.219) of stimulation. Moreover, Met carriers, but not Val/Val homozygotes, exhibited larger responses to TMS (p = 0.046) after 20 min atDCS, than following 10 min atDCS. On an individual level, two-step cluster analysis revealed a considerable degree of inter-individual variability, with under half of the total sample (42%) showing the expected potentiation of CSE in response to atDCS across both sessions. Intra-individual variability in response to different durations of atDCS was also apparent, with one-third of the total sample (34%) exhibiting LTP-like effects in one session but LTD-like effects in the other session. Both the inter-individual (p = 0.027) and intra-individual (p = 0.04) variability was associated with BDNF genotype. In older adults, the BDNF Val66Met polymorphism along with stimulation duration appears to play a role in modulating tDCS-induced motor cortex plasticity. The results may have implications for the design of NBS protocols for healthy and diseased aged populations. © 2015 Puri, Hinder, Fujiyama, Gomez, Carson and Summers.
- Authors: Puri, Rohan , Hinder, Mark , Fujiyama, Hakuei , Gomez, Rapson , Carson, Richard , Summers, Jeff
- Date: 2015
- Type: Text , Journal article
- Relation: Frontiers in Aging Neuroscience Vol. 7, no. JUN (2015), p. 1-10
- Full Text:
- Reviewed:
- Description: The brain derived neurotrophic factor (BDNF) Val66Met polymorphism and stimulation duration are thought to play an important role in modulating motor cortex plasticity induced by non-invasive brain stimulation (NBS). In the present study we sought to determine whether these factors interact or exert independent effects in older adults. Fifty-four healthy older adults (mean age = 66.85 years) underwent two counterbalanced sessions of 1.5 mA anodal transcranial direct current stimulation (atDCS), applied over left M1 for either 10 or 20 min. Single pulse transcranial magnetic stimulation (TMS) was used to assess corticospinal excitability (CSE) before and every 5 min for 30 min following atDCS. On a group level, there was an interaction between stimulation duration and BDNF genotype, with Met carriers (n = 13) showing greater post-intervention potentiation of CSE compared to Val66Val homozygotes homozygotes (n = 37) following 20 min (p = 0.002) but not 10 min (p = 0.219) of stimulation. Moreover, Met carriers, but not Val/Val homozygotes, exhibited larger responses to TMS (p = 0.046) after 20 min atDCS, than following 10 min atDCS. On an individual level, two-step cluster analysis revealed a considerable degree of inter-individual variability, with under half of the total sample (42%) showing the expected potentiation of CSE in response to atDCS across both sessions. Intra-individual variability in response to different durations of atDCS was also apparent, with one-third of the total sample (34%) exhibiting LTP-like effects in one session but LTD-like effects in the other session. Both the inter-individual (p = 0.027) and intra-individual (p = 0.04) variability was associated with BDNF genotype. In older adults, the BDNF Val66Met polymorphism along with stimulation duration appears to play a role in modulating tDCS-induced motor cortex plasticity. The results may have implications for the design of NBS protocols for healthy and diseased aged populations. © 2015 Puri, Hinder, Fujiyama, Gomez, Carson and Summers.
Choosing a cut-off on the severity of dependence scale for ecstasy use
- Bruno, Raimondo, Gomez, Rapson, Matthews, Allison
- Authors: Bruno, Raimondo , Gomez, Rapson , Matthews, Allison
- Date: 2011
- Type: Text , Journal article
- Relation: Open Addiction Journal Vol. 4, no. 13-14 (2011)
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- Description: Despite controversy about the potential for the development of dependence in relation to ecstasy [1], some people do experience problems with ecstasy use, and full case reports of dependence have been identified [2]. The Severity of Dependence Scale (SDS) is a brief, five-item screening instrument that has demonstrated validity in identifying cases of DSM cannabis, amphetamine, cocaine and benzodiazepine dependence. This study aimed to determine a cut-off score on the SDS that could provide a useful indication of individuals that are potentially ecstasy dependent according to DSM criteria.
- Description: Despite controversy about the potential for the development of dependence in relation to ecstasy [1], some people do experience problems with ecstasy use, and full case reports of dependence have been identified [2]. The Severity of Dependence Scale (SDS) is a brief, five-item screening instrument that has demonstrated validity in identifying cases of DSM cannabis, amphetamine, cocaine and benzodiazepine dependence. This study aimed to determine a cut-off score on the SDS that could provide a useful indication of individuals that are potentially ecstasy dependent according to DSM criteria
- Authors: Bruno, Raimondo , Gomez, Rapson , Matthews, Allison
- Date: 2011
- Type: Text , Journal article
- Relation: Open Addiction Journal Vol. 4, no. 13-14 (2011)
- Full Text:
- Reviewed:
- Description: Despite controversy about the potential for the development of dependence in relation to ecstasy [1], some people do experience problems with ecstasy use, and full case reports of dependence have been identified [2]. The Severity of Dependence Scale (SDS) is a brief, five-item screening instrument that has demonstrated validity in identifying cases of DSM cannabis, amphetamine, cocaine and benzodiazepine dependence. This study aimed to determine a cut-off score on the SDS that could provide a useful indication of individuals that are potentially ecstasy dependent according to DSM criteria.
- Description: Despite controversy about the potential for the development of dependence in relation to ecstasy [1], some people do experience problems with ecstasy use, and full case reports of dependence have been identified [2]. The Severity of Dependence Scale (SDS) is a brief, five-item screening instrument that has demonstrated validity in identifying cases of DSM cannabis, amphetamine, cocaine and benzodiazepine dependence. This study aimed to determine a cut-off score on the SDS that could provide a useful indication of individuals that are potentially ecstasy dependent according to DSM criteria
The shame and guilt scales of the Test of Self-Conscious Affect-Adolescent (TOSCA-A) : Psychometric properties for responses from children, and measurement invariance across children and adolescents
- Watson, Shaun, Gomez, Rapson, Gullone, Eleonora
- Authors: Watson, Shaun , Gomez, Rapson , Gullone, Eleonora
- Date: 2016
- Type: Text , Journal article
- Relation: Frontiers in Psychology Vol. 7, no. MAY (2016), p. 1-10
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- Reviewed:
- Description: This study examined various psychometric properties of the items comprising the shame and guilt scales of the Test of Self-Conscious Affect-Adolescent (TOSCA-A) in a group children between 8 and 11 years of age. A total of 699 children (367 females and 332 males) completed these scales, and also measures of depression and empathy. Confirmatory factor analysis (CFA) provided support for an oblique two-factor model, with the originally proposed shame and guilt items comprising shame and guilt factors, respectively. There was good internal consistency reliability for the shame and guilt scales, with omega coefficient values of 0.77 and 0.81 for shame and guilt, respectively. Also, shame correlated with depression symptoms positively (0.34, p < 0.001) and had no relation with empathy (-0.07, ns). Guilt correlated with depression symptoms negatively (-0.28, p < 0.001), and with empathy positively (0.13. p < 0.05). Thus there was support for the convergent and discriminant validity of the shame and guilt factors. Multiple-group CFA comparing this group of children with a separate group of adolescents (320 females and 242 males), based on the chi-square difference test, supported full metric invariance, the intercept invariance of 17 of the 30 shame and guilt items, and higher latent mean scores among children for both shame and guilt. The non-equivalency for intercepts and mean scores were of small effect sizes. Comparisons based on the difference in root mean squared error of approximation values supported full measurement invariance and no group difference for latent mean scores. The findings in the current study support the use of the TOSCA-A in children and the valid comparison of scores between children and adolescents, thereby opening up the possibility of evaluating change in the TOSCA-A shame and guilt factors over these developmental age groups. © 2016 Watson, Gomez and Gullone.
- Authors: Watson, Shaun , Gomez, Rapson , Gullone, Eleonora
- Date: 2016
- Type: Text , Journal article
- Relation: Frontiers in Psychology Vol. 7, no. MAY (2016), p. 1-10
- Full Text:
- Reviewed:
- Description: This study examined various psychometric properties of the items comprising the shame and guilt scales of the Test of Self-Conscious Affect-Adolescent (TOSCA-A) in a group children between 8 and 11 years of age. A total of 699 children (367 females and 332 males) completed these scales, and also measures of depression and empathy. Confirmatory factor analysis (CFA) provided support for an oblique two-factor model, with the originally proposed shame and guilt items comprising shame and guilt factors, respectively. There was good internal consistency reliability for the shame and guilt scales, with omega coefficient values of 0.77 and 0.81 for shame and guilt, respectively. Also, shame correlated with depression symptoms positively (0.34, p < 0.001) and had no relation with empathy (-0.07, ns). Guilt correlated with depression symptoms negatively (-0.28, p < 0.001), and with empathy positively (0.13. p < 0.05). Thus there was support for the convergent and discriminant validity of the shame and guilt factors. Multiple-group CFA comparing this group of children with a separate group of adolescents (320 females and 242 males), based on the chi-square difference test, supported full metric invariance, the intercept invariance of 17 of the 30 shame and guilt items, and higher latent mean scores among children for both shame and guilt. The non-equivalency for intercepts and mean scores were of small effect sizes. Comparisons based on the difference in root mean squared error of approximation values supported full measurement invariance and no group difference for latent mean scores. The findings in the current study support the use of the TOSCA-A in children and the valid comparison of scores between children and adolescents, thereby opening up the possibility of evaluating change in the TOSCA-A shame and guilt factors over these developmental age groups. © 2016 Watson, Gomez and Gullone.
A multilevel longitudinal study of obsessive compulsive symptoms in adolescence: Male gender and emotional stability as protective factors
- Stavropoulos, Vasileios, Moore, Kathleen, Lazaratou, Helen, Dikeos, Dimitris, Gomez, Rapson
- Authors: Stavropoulos, Vasileios , Moore, Kathleen , Lazaratou, Helen , Dikeos, Dimitris , Gomez, Rapson
- Date: 2017
- Type: Text , Journal article
- Relation: Annals of General Psychiatry Vol. 16, no. 42 (2017), p.1-12
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- Description: The severity of obsessive compulsive symptoms (OCS) is suggested to be normally distributed in the general population, and they appear to have an impact on a range of aspects of adolescent development. Importantly, there are individual differences regarding susceptibility to OCS. In the present repeated measures study, OCS were studied in relation to gender and emotional stability (as a personality trait) using a normative sample of 515 adolescents at ages 16 and 18 years. OCS were assessed with the relevant subscale of the SCL-90-R and emotional stability with the Five Factor Questionnaire. A three-level hierarchical linear model was calculated to longitudinally assess the over time variations of OCS and their over time links to gender and emotional stability, while controlling for random effects due to the nesting of the data. Experiencing OCS increased with age (between 16 and 18 years). Additionally, male gender and higher emotional stability were associated with lower OCS at 16 years and these remained stable over time. Results indicate age-related and between individual differences on reported OCS that need to be considered for prevention and intervention planning.
- Authors: Stavropoulos, Vasileios , Moore, Kathleen , Lazaratou, Helen , Dikeos, Dimitris , Gomez, Rapson
- Date: 2017
- Type: Text , Journal article
- Relation: Annals of General Psychiatry Vol. 16, no. 42 (2017), p.1-12
- Full Text:
- Reviewed:
- Description: The severity of obsessive compulsive symptoms (OCS) is suggested to be normally distributed in the general population, and they appear to have an impact on a range of aspects of adolescent development. Importantly, there are individual differences regarding susceptibility to OCS. In the present repeated measures study, OCS were studied in relation to gender and emotional stability (as a personality trait) using a normative sample of 515 adolescents at ages 16 and 18 years. OCS were assessed with the relevant subscale of the SCL-90-R and emotional stability with the Five Factor Questionnaire. A three-level hierarchical linear model was calculated to longitudinally assess the over time variations of OCS and their over time links to gender and emotional stability, while controlling for random effects due to the nesting of the data. Experiencing OCS increased with age (between 16 and 18 years). Additionally, male gender and higher emotional stability were associated with lower OCS at 16 years and these remained stable over time. Results indicate age-related and between individual differences on reported OCS that need to be considered for prevention and intervention planning.
Growth mixture modeling of depression symptoms following traumatic brain injury
- Gomez, Rapson, Skilbeck, Clive, Thomas, Matt, Slatyer, Mark
- Authors: Gomez, Rapson , Skilbeck, Clive , Thomas, Matt , Slatyer, Mark
- Date: 2017
- Type: Text , Journal article
- Relation: Frontiers in Psychology Vol. 8, no. AUG (2017), p. 1-14
- Full Text:
- Reviewed:
- Description: Growth Mixture Modeling (GMM) was used to investigate the longitudinal trajectory of groups (classes) of depression symptoms, and how these groups were predicted by the covariates of age, sex, severity, and length of hospitalization following Traumatic Brain Injury (TBI) in a group of 1074 individuals (696 males, and 378 females) from the Royal Hobart Hospital, who sustained a TBI. The study began in late December 2003 and recruitment continued until early 2007. Ages ranged from 14 to 90 years, with a mean of 35.96 years (SD = 16.61). The study also examined the associations between the groups and causes of TBI. Symptoms of depression were assessed using the Hospital Anxiety and Depression Scale within 3 weeks of injury, and at 1, 3, 6, 12, and 24 months post-injury. The results revealed three groups: low, high, and delayed depression. In the low group depression scores remained below the clinical cut-off at all assessment points during the 24-months post-TBI, and in the high group, depression scores were above the clinical cut-off at all assessment points. The delayed group showed an increase in depression symptoms to 12 months after injury, followed by a return to initial assessment level during the following 12 months. Covariates were found to be differentially associated with the three groups. For example, relative to the low group, the high depression group was associated with more severe TBI, being female, and a shorter period of hospitalization. The delayed group also had a shorter period of hospitalization, were younger, and sustained less severe TBI. Our findings show considerable fluctuation of depression over time, and that a non-clinical level of depression at any one point in time does not necessarily mean that the person will continue to have non-clinical levels in the future. As we used GMM, we were able to show new findings and also bring clarity to contradictory past findings on depression and TBI. Consequently, we recommend the use of this approach in future studies in this area. © 2017 Gomez, Skilbeck, Thomas and Slatyer.
- Authors: Gomez, Rapson , Skilbeck, Clive , Thomas, Matt , Slatyer, Mark
- Date: 2017
- Type: Text , Journal article
- Relation: Frontiers in Psychology Vol. 8, no. AUG (2017), p. 1-14
- Full Text:
- Reviewed:
- Description: Growth Mixture Modeling (GMM) was used to investigate the longitudinal trajectory of groups (classes) of depression symptoms, and how these groups were predicted by the covariates of age, sex, severity, and length of hospitalization following Traumatic Brain Injury (TBI) in a group of 1074 individuals (696 males, and 378 females) from the Royal Hobart Hospital, who sustained a TBI. The study began in late December 2003 and recruitment continued until early 2007. Ages ranged from 14 to 90 years, with a mean of 35.96 years (SD = 16.61). The study also examined the associations between the groups and causes of TBI. Symptoms of depression were assessed using the Hospital Anxiety and Depression Scale within 3 weeks of injury, and at 1, 3, 6, 12, and 24 months post-injury. The results revealed three groups: low, high, and delayed depression. In the low group depression scores remained below the clinical cut-off at all assessment points during the 24-months post-TBI, and in the high group, depression scores were above the clinical cut-off at all assessment points. The delayed group showed an increase in depression symptoms to 12 months after injury, followed by a return to initial assessment level during the following 12 months. Covariates were found to be differentially associated with the three groups. For example, relative to the low group, the high depression group was associated with more severe TBI, being female, and a shorter period of hospitalization. The delayed group also had a shorter period of hospitalization, were younger, and sustained less severe TBI. Our findings show considerable fluctuation of depression over time, and that a non-clinical level of depression at any one point in time does not necessarily mean that the person will continue to have non-clinical levels in the future. As we used GMM, we were able to show new findings and also bring clarity to contradictory past findings on depression and TBI. Consequently, we recommend the use of this approach in future studies in this area. © 2017 Gomez, Skilbeck, Thomas and Slatyer.
Confirmatory factor analysis and exploratory structural equation modelling of the factor structure of the depression anxiety and stress scales-21
- Gomez, Rapson, Stavropoulos, Vasileios, Griffiths, Mark
- Authors: Gomez, Rapson , Stavropoulos, Vasileios , Griffiths, Mark
- Date: 2020
- Type: Text , Journal article
- Relation: Plos One Vol. 15, no. 6 (Jun 2020), p. 16
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- Description: The Depression Anxiety and Stress Scales-21 (DASS-21) involves a simple structure first-order three-factor oblique model, with factors for depression, anxiety, and stress. Recently, concerns have been raised over the value of using confirmatory factor analysis (CFA) for studying the factor structure of scales in general. However, such concerns can be circumvented using exploratory structural equation modeling (ESEM). Consequently, the present study used CFA and ESEM with target rotation to examine the factor structure of the DASS-21 among an adult community. It compared first-order CFA, ESEM with target rotation, bi-factor CFA (BCFA), and bi-factor BESEM with target rotation models with group/specific factors for depression, anxiety, and stress. A total of 738 adults (males = 374, and females = 364; M = 25.29 years; SD = 7.61 years) completed the DASS-21. While all models examined showed good global fit values, one or more of the group/specific factors in the BCFA, ESEM with target rotation and BESEM with target rotation models were poorly defined. As the first-order CFA model was most parsimonious, with well-defined factors that were also supported in terms of their reliabilities and validities, this model was selected as the preferred DASS-21 model. The implications of the findings for use and revision of the DASS-21 are discussed.
- Authors: Gomez, Rapson , Stavropoulos, Vasileios , Griffiths, Mark
- Date: 2020
- Type: Text , Journal article
- Relation: Plos One Vol. 15, no. 6 (Jun 2020), p. 16
- Full Text:
- Reviewed:
- Description: The Depression Anxiety and Stress Scales-21 (DASS-21) involves a simple structure first-order three-factor oblique model, with factors for depression, anxiety, and stress. Recently, concerns have been raised over the value of using confirmatory factor analysis (CFA) for studying the factor structure of scales in general. However, such concerns can be circumvented using exploratory structural equation modeling (ESEM). Consequently, the present study used CFA and ESEM with target rotation to examine the factor structure of the DASS-21 among an adult community. It compared first-order CFA, ESEM with target rotation, bi-factor CFA (BCFA), and bi-factor BESEM with target rotation models with group/specific factors for depression, anxiety, and stress. A total of 738 adults (males = 374, and females = 364; M = 25.29 years; SD = 7.61 years) completed the DASS-21. While all models examined showed good global fit values, one or more of the group/specific factors in the BCFA, ESEM with target rotation and BESEM with target rotation models were poorly defined. As the first-order CFA model was most parsimonious, with well-defined factors that were also supported in terms of their reliabilities and validities, this model was selected as the preferred DASS-21 model. The implications of the findings for use and revision of the DASS-21 are discussed.