ADHD and hyperkinetic disorder symptoms in Australian adults : Descriptive scores, incidence rates, factor structure, and gender invariance
- Authors: Gomez, Rapson
- Date: 2016
- Type: Text , Journal article
- Relation: Journal of Attention Disorders Vol. 20, no. 4 (2016), p. 325-334
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- Description: OBJECTIVE: ADHD and Hyperkinetic Disorder (HKD) have the same 18 symptoms, covering inattention (IA), hyperactivity (HYP), and impulsivity (IMP). This study was aimed at providing descriptive scores for the different symptom groups in these disorders and how these scores varied by age and gender, the percentages of individuals meeting the symptom thresholds for the different ADHD types and HKD, the factor structure, and gender invariance of these symptoms in adults. METHOD: To accomplish this, 852 adults provided self-ratings for a scale comprising the 18 ADHD/HKD symptoms. RESULTS: The findings showed that age and gender had minimal effects on the ADHD symptoms. Also, in terms of symptom counts, 2% had HKD and 6.3% had ADHD (inattentive = 1.6%, hyperactive-impulsive = 2.7%, and combined type = 2.0%). Confirmatory factor analysis (CFA) provided most support for the three-factor HKD model, involving separate factors for the IA, HYP, and IMP symptoms. This model showed full measurement invariance across gender. CONCLUSION: The theoretical and clinical implications of the findings are discussed.
Bifactor model of WISC-IV : Applicability and measurement invariance in low and normal IQ groups
- Authors: Gomez, Rapson , Vance, Alasdair , Watson, Shaun
- Date: 2016
- Type: Text , Journal article
- Relation: Psychological Assessment Vol. 29, no. 17 (2016), p. 902-912
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- Description: This study examined the applicability and measurement invariance of the bifactor model of the 10 Wechsler Intelligence Scale for Children-Fourth Edition (WISC-IV) core subtests in groups of children and adolescents (age range from 6 to 16 years) with low (IQ =79; N = 229; % male = 75.9) and normal (IQ >/=80; N = 816; % male = 75.0) IQ scores. Results supported this model in both groups, and there was good support for measurement invariance for this model across these groups. For all participants together, the omega hierarchical and explained common variance (ECV) values were high for the general factor and low to negligible for the specific factors. Together, the findings favor the use of the Full Scale IQ (FSIQ) scores of the WISC-IV, but not the subscale index scores. (PsycINFO Database Record
Factor structure of the Social Interaction Anxiety Scale and the Social Phobia Scale Short Forms
- Authors: Gomez, Rapson
- Date: 2016
- Type: Text , Journal article
- Relation: Personality and Individual Differences Vol. 96, no. (2016), p. 83-87
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- Description: The study used frequentist confirmatory factor analyses (CFA) and Bayesian CFA (BCFA) (one-factor, two-factor, and bifactor models) for Peters, Sunderland, Andrews, Rapee, and Mattick's (2012) short form Social Anxiety Interaction Scale (SAIS) and Fergus, Valentiner, McGrath, Gier-Lonsway, and Kim's (2012) short form Social Phobia Scale (SPS) Short Forms. Participants (N = 200) were adults from the general community who completed the full version of SIAS and SPS measures. For the different models tested, CFA provided moderate support for the two-factor model for Peters et al.'s Short Forms. BCFA showed good support for the two-factor and bifactor models for Peters et al.'s Short Forms, with the bifactor model showing better fit. This bifactor model showed high internal consistency reliability and had a high amount of explained common variance for its general factor. The SIAS and SPS specific factors of the bifactor model showed almost negligible internal consistency reliabilities and explained common variances. © 2016 Elsevier Ltd.
Interrelationships of the Rothbart's temperament model constructs with revised-reinforcement sensitivity theory constructs
- Authors: Gomez, Rapson , Watson, Shaun , Gomez, Andre
- Date: 2016
- Type: Text , Journal article
- Relation: Personality and Individual Differences Vol. 99, no. (2016), p. 118-121
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- Description: Relationships between the constructs in Rothbart's temperament model and the revised-reinforcement sensitivity theory (r-RST) were examined. A group of 329 adults from the general population completed the Adult Temperament Questionnaire and the Behavioural Inhibition System/Behavioural Activation System Scales. Correlation analyses showed that temperament negative affectivity was relatively highly associated with the RST constructs of the behavioral inhibition system (BIS) and fight-flight-freeze system (FFFS) and temperament extraversion/surgency was relatively highly associated with the behavioral approach system (BAS) construct of reward responsiveness. Temperament effortful control showed no association with the RST constructs. The overlap between the constructs in Rothbart's temperament and r-RST models is discussed. © 2016 Elsevier Ltd.
Marital status and problem gambling among Australian older adults : The mediating role of loneliness
- Authors: Botterill, Emma , Gill, Peter , McLaren, Suzanne , Gomez, Rapson
- Date: 2016
- Type: Text , Journal article
- Relation: Journal of Gambling Studies Vol. 32, no. 3 (2016), p. 1027-1038
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- Description: Problem gambling rates in older adults have risen dramatically in recent years and require further investigation. Limited available research has suggested that social needs may motivate gambling and hence problem gambling in older adults. Un-partnered older adults may be at greater risk of problem gambling than those with a partner. The current study explored whether loneliness mediated the marital status-problem gambling relationship, and whether gender moderated the mediation model. It was hypothesised that the relationship between being un-partnered and higher levels of loneliness would be stronger for older men than older women. A community sample of Australian men (n = 92) and women (n = 91) gamblers aged from 60 to 90 years (M = 69.75, SD = 7.28) completed the UCLA Loneliness Scale and the Problem Gambling Severity Index. The results supported the moderated mediation model, with loneliness mediating the relationship between marital status and problem gambling for older men but not for older women. It appears that felt loneliness is an important predictor of problem gambling in older adults, and that meeting the social and emotional needs of un-partnered men is important.
Maternal ratings of the ADHD symptoms : Subtypes versus severity in clinic-referred children and adolescents
- Authors: Gomez, Rapson , Vance, Alasdair , Gomez, Rashika
- Date: 2016
- Type: Text , Journal article
- Relation: Journal of Attention Disorders Vol. 20, no. 5 (2016), p. 414-423
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- Description: OBJECTIVE: This study used confirmatory factor analysis (CFA), latent class analysis (LCA), and factor mixture model (FMM) to ascertain the best model for ADHD symptoms, as presented in the Strengths and Weaknesses of ADHD-Symptoms and Normal Behavior Scale (SWAN). METHOD: Mother ratings of the ADHD symptoms of 418 clinic-referred children and adolescents were obtained. RESULTS: The findings provided most support for an FMM with two classes (less severe inattention [IA] and hyperactivity/impulsivity [HI] symptoms and more severe IA/HI symptoms) and two factors (IA and HI) model. The more severe class had more individuals with the ADHD diagnosis, especially the combined type. CONCLUSION: The findings are discussed in relation to dimensional and categorical views of ADHD.
Structure of the Wechsler intelligence scale for children - Fourth edition in a group of children with ADHD
- 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
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- 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.
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
- 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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- 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.
Agreement of adolescent ratings with mother ratings and teacher ratings of ADHD symptom groups: A correlated trait-correlated method minus one analysis
- Authors: Gomez, Rapson , Gomez, Andre
- Date: 2015
- Type: Text , Journal article
- Relation: Personality and Individual Differences Vol. 82, no. (2015), p. 131-135
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- Description: This study examined the level of agreement of adolescent ratings with mother ratings, and adolescent ratings with teacher ratings of the inattention (IA) and hyperactivity/impulsivity (HI) symptom groups of ADHD. A total of 214 adolescents provided self-ratings of IA and HI, and their IA and HI were also rated by their mothers and teachers. The correlated trait-correlated method minus one model was applied, with adolescent ratings as the reference method, and the other two ratings as the non-reference methods. The findings indicated no additional variance in adolescent ratings for IA and HI that could not be accounted by mother ratings of IA and HI, respectively. In contrast, there was additional variance in adolescent ratings for IA and HI that could was not accounted by teacher ratings of IA and HI, respectively. The findings suggest that when diagnosing ADHD in adolescents, their reports of their own ADHD behaviors are not needed when mother reports of such behaviors are used. © 2015.
Duration-dependent effects of the BDNF Val66Met polymorphism on anodal tDCS induced motor cortex plasticity in older adults : A group and individual perspective
- 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.
Evaluation of the bifactor structure of the dispositional hope scale
- Authors: Gomez, Rapson , McLaren, Suzanne , Sharp, Mersey , Smith, Cara , Hearn, Kate , Turner, Leah
- Date: 2015
- Type: Text , Journal article
- Relation: Journal of Personality Assessment Vol. 97, no. 2 (2015), p. 191-9
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- Description: The Dispositional Hope Scale (DHS; Snyder et al., 1991) is composed of items assessing an individual's perception of his or her agency and pathways. This study examined support for the bifactor structure and relation of the factors in this model with depressive symptoms. It also examined cross-gender measurement invariance for the bifactor model. A community sample of 413 women and 257 men completed the DHS. Confirmatory factor analysis indicated more support for the bifactor model than the 1- and 2-factor models. Results also indicated full measurement invariance across gender for the bifactor and the 2-factor models. The general and the specific agency factors, but not the specific pathways factor, correlated with depressive symptoms. The better support for the bifactor model suggests that ideally hope has to be measured and examined by factors reflecting high covariance for agency and pathways, and also factors reflecting unique variances for agency and pathways. The support for full cross-gender measurement invariance indicated that there are no differences in measurement and scaling properties for the DHS across ratings provided by women and men, and therefore the DHS ratings can be scored in the same way for women and men.
Malaysia parent ratings of the parent–parental acceptance–rejection questionnaire: Invariance across ratings of Malay, Chinese, and Indian Children
- Authors: Gomez, Rapson , Suhaimi, Aida Farhana
- Date: 2015
- Type: Text , Journal article
- Relation: Cross-Cultural Research Vol. 49, no. 1 (2015), p. 90-105
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- Description: This study used multiple-group confirmatory factor analysis procedure to examine the measurement and structural invariance across Malaysian Malay (n = 724), Chinese (n = 372), and Indian (n = 259) parent ratings of their children on the short version of the Parent–Parental Acceptance–Rejection Questionnaire (Parent-PARQ/S). The Parent-PARQ/S measures parents’ perceptions of their rejection of their children and has scales for coldness/lack of affection, hostility/aggression, indifference/neglect, and undifferentiated rejection. Results provided strong support for the measurement and structural invariance of the Parent-PARQ/S. In addition, the three ethnic groups did not differ for all four latent mean scores.
The Center for Epidemiologic Studies Depression Scale: Support for a bifactor model with a dominant general factor and a specific factor for positive affect
- Authors: Gomez, Rapson , McLaren, Suzanne
- Date: 2015
- Type: Text , Journal article
- Relation: Assessment Vol. 22, no. 3 (2015), p. 351-360
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- Description: Objectives: For the Center for Epidemiologic Studies Depression Scale (CES-D) ratings, the study examined support for a bifactor model, and also the internal consistency reliability and external validity of the factors in this model. Method: Participants (N = 1,178) were older adults from the general community who completed the CES-D. Results: Confirmatory factor analysis of their ratings indicated support for the bifactor model. For this model, the general factor explained most of the covariance in the scores of the CES-D items for Depressed Affect, Somatic Symptoms and Retarded Activity, and Interpersonal Difficulties items. Most of the covariance in the scores of the Positive Affect (PA) scale was explained by its own specific factor. Additional analyses showed support for internal consistencies and external validities of general factors based on all the CES-D items, and when PA items were excluded, and also the PA-specific factor. Discussion: The findings support the use of a total CES-D score without the PA items and also the concurrent use of the PA scale score. © The Author(s) 2014.
The Center for Epidemiological Studies Depression Scale: Measurement and structural invariance across ratings of older adult men and women
- Authors: Gomez, Rapson , McLaren, Suzanne
- Date: 2015
- Type: Text , Journal article
- Relation: Personality and Individual Differences Vol. 75, no. (2015), p. 130-134
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- Description: The current study examined the measurement and structural invariance of the Center for Epidemiological Studies Depression Scale (CES-D; Radloff, 1977) across ratings provided by older adult men (. n=. 573) and women (. n=. 605). Ratings were modeled in terms of the original four-factor oblique model: a simple structure with correlated factors for Depressed Affect, Positive Affect, Somatic Symptoms, and Interpersonal Difficulties. Multiple-group confirmatory factor analysis supported full measurement and structural invariance, and no sex difference for the four latent factors. These findings indicate good support for measurement and structural invariance of CES-D ratings across older adult men and women. The psychometric and practical implications of the findings are discussed.
ADHD and personality : A meta-analytic review
- Authors: Gomez, Rapson , Corr, Philip
- Date: 2014
- Type: Text , Journal article
- Relation: Clinical Psychology Review Vol. 34, no. 5 (2014), p. 376-788
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- Description: We report a meta-analysis of up to 40 data sets that examined the personality dimensions in the Five-Factor Model (FFM) and the integrated Five-Factor Model (IFFM) in relation to ADHD symptom domains of inattention (IA) and hyperactivity/impulsivity (HI). The IFFM incorporated the dimensions of other personality models (in particular, those of Eysenck, Tellegen, and Cloninger, as well as the FFM). Major findings were: (1) IA and HI were both associated with low conscientious inhibition/conscientiousness, and low agreeable inhibition/agreeableness, and with high negative emotionality/neuroticism; (2) conscientious inhibition and conscientiousness were more strongly related to IA than HI; (3) agreeable inhibition and agreeableness were more strongly related to HI than IA; and (4) the association of conscientious inhibition and conscientiousness with HI was moderated by age group and source from where participants were recruited (associations were stronger in children than adults, and clinical samples than community samples). These findings are discussed in relation to single and multiple pathway theories, underlying factors and processes for the personality-ADHD link, and clinical implications.
ADHD bifactor model based on parent and teacher ratings of Malaysian children
- Authors: Gomez, Rapson
- Date: 2014
- Type: Text , Journal article
- Relation: Asian Journal of Psychiatry Vol. 8, no. 1 (2014), p. 47-51
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Analysis of the convergent and discriminant validity of the CBCL, TRF, and YSR in a clinic-referred sample
- Authors: Gomez, Rapson , Vance, Alasdair , Gomez, Rashika
- Date: 2014
- Type: Text , Journal article
- Relation: Journal of Abnormal Child Psychology Vol. 42, no. 8 (2014), p. 1413-1425
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- Description: This study used the correlated trait-correlated method minus one model to examine the convergent and discriminant validity of the Child Behavior Checklist (CBCL), Teacher's Report Form (TRF) and Youth Self-Report (YSR), based on ratings of clinic-referred adolescents. A total of 294 adolescents, comprising 70.5 % males, provided self-ratings on the YSR. The adolescents were also rated by their mothers and teachers on the CBCL and TRF respectively. The findings indicated some support for convergent validity for the CBCL and TRF for Anxious/Depressed, Withdrawn/Depressed and Rule Breaking Behavior, and for the convergent validity for the CBCL and YSR for Rule Breaking Behavior. There was support for the discriminant validity between virtually all the traits. The findings are discussed in relation to the construct validity, cross-informant agreement, and clinical use of the CBCL, TRF and YSR.
Attention-Deficit/Hyperactivity Disorder symptoms in an adult sample: Associations with Rothbart's temperament dimensions
- Authors: Gomez, Rapson , Kyriakides, Chantelle , Devlin, Elaine
- Date: 2014
- Type: Text , Journal article
- Relation: Personality and Individual Differences Vol. 60, no. (2014), p. 73-78
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- Description: Relationships between Rothbart's 13 temperament sub-dimensions and the Attention-Deficit/Hyperactivity Disorder (ADHD) factors for the 2-factor model [inattention (IA) and hyperactivity/impulsivity (HI) domains] and the bifactor model (general ADHD, and specific factors for IA and HI) were examined in 267 adults from the general population. Regression analyses revealed that (1) both the IA and HI factors in the 2-factor model and the general ADHD factor in the bifactor model were predicted positively by sad, discomfort and associative sensitivity, and negatively by activation control, (2) the HI domain factor in the 2-factor model was also predicted negatively by inhibitory control, (3) the specific IA factor in the bifactor model was predicted negatively by activation control and attention control, and (4) the HI specific factor in the bifactor model was predicted negatively by inhibitory control and positively by sociability. These theoretical and clinical implications of the findings are discussed. © 2014.
Confirmatory factor analysis, latent profile analysis, and factor mixture modeling of the syndromes of the child behavior checklist and teacher report form
- Authors: Gomez, Rapson , Vance, Alasdair
- Date: 2014
- Type: Text , Journal article
- Relation: Psychological Assessment Vol. 26, no. 4 (2014), p. 1307-1316
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- Description: The current study used confirmatory factor analysis (CFA), latent profile analysis (LPA), and factor mixture modeling (FMM) to examine the co-occurrence of the childhood syndromes using the Child Behavior Checklist (CBCL) and Teacher Report Form (TRF). Parents and teachers completed the CBCL and TRF, respectively, for a clinic-referred sample of 720 children, ages 7-12 years. For the CBCL, the analyses indicated most support a 2-class 2-factor FMM, and for the TRF, there was most support for a 2-class 3-factor model. The classes were all syndromes at average levels and all syndromes at high levels. The findings indicate high syndrome co-occurrence. The implications of the findings for understanding syndrome co-occurrence in the CBCL and TRF, theories of syndrome co-occurrence, and the clinical use of the CBCL and TRF are discussed.
Correlated trait-correlated method minus one analysis of the convergent and discriminant validities of the strengths and difficulties questionnaire
- Authors: Gomez, Rapson
- Date: 2014
- Type: Text , Journal article
- Relation: Assessment Vol. 21, no. 3 (2014), p. 372-382
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- Description: This study used the correlated trait-correlated method minus one model to examine the convergent and discriminant validity of the scales of the Strengths and Difficulties Questionnaire (SDQ). The SDQ scales are emotional symptoms (ES), conduct problems (CP), hyperactivity (HY), peer problems (PP), and prosocial behaviors (PS). A total of 202 adolescents provided self-ratings and were also rated by their mothers and teachers. The findings indicated support for convergent validity for all five SDQ scales for all three respondents. Generally there was more convergence between mother-adolescent ratings than mother-teacher and adolescent-teacher ratings, especially for ES and PP. There was support for the discriminant validity between the traits in all scales, except between CP and HY. The findings are discussed in relation to the construct validity and clinical use of the SDQ.