Attention-deficit/hyperactivity disorder and sluggish cognitive tempo throughout childhood: temporal invariance and stability from preschool through ninth grade / Daniel R. LEOPOLD in Journal of Child Psychology and Psychiatry, 57-9 (September 2016)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 57-9 (September 2016) . - p.1066-1074 Titre : Attention-deficit/hyperactivity disorder and sluggish cognitive tempo throughout childhood: temporal invariance and stability from preschool through ninth grade Type de document : Texte imprimé et/ou numérique Auteurs : Daniel R. LEOPOLD, Auteur ; Micaela E. CHRISTOPHER, Auteur ; G. Leonard BURNS, Auteur ; Stephen P. BECKER, Auteur ; Richard K. OLSON, Auteur ; Erik G. WILLCUTT, Auteur Article en page(s) : p.1066-1074 Langues : Anglais (eng) Mots-clés : ADHD  attention-deficit/hyperactivity disorder  sluggish cognitive tempo  sluggish tempo  inattention  hyperactivity  stability  temporal invariance  measurement invariance Index. décimale : PER Périodiques Résumé : Background Although multiple cross-sectional studies have shown symptoms of sluggish cognitive tempo (SCT) and attention-deficit/hyperactivity disorder (ADHD) to be statistically distinct, studies have yet to examine the temporal stability and measurement invariance of SCT in a longitudinal sample. To date, only six studies have assessed SCT longitudinally, with the longest study examining SCT over a 2-year period. The overall goals of this study were to assess the 10-year longitudinal stability and interfactor relationships of ADHD and SCT symptoms among a community sample of children. Methods Confirmatory factor analysis was used to assess the temporal invariance of ADHD and SCT symptoms in a large population-based longitudinal sample (International Longitudinal Twin Study of Early Reading Development) that included children assessed at preschool and after kindergarten, first, second, fourth, and ninth grades (n = 489). Latent autoregressive models were then estimated to assess the stability of these constructs. Results Results demonstrated invariance of item loadings and intercepts from preschool through ninth grades, as well as invariance of interfactor correlations. Results further indicated that both ADHD and SCT are highly stable across these years of development, that these symptom dimensions are related but also separable, and that hyperactivity/impulsivity and SCT are both more strongly correlated with inattention than with each other and show differential developmental trajectories. Specifically, even in the presence of latent simplex analyses providing support for the developmental stability of these dimensions, linear comparisons indicated that that mean levels of hyperactivity/impulsivity decreased with time, inattentive ratings were generally stable, and SCT tended to increase slightly across development. Conclusions This study adds to the current literature by being the first to systematically assess and demonstrate the temporal invariance and stability of ADHD and SCT across a span of 10 years. En ligne : http://dx.doi.org/10.1111/jcpp.12505 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=292 [article] Attention-deficit/hyperactivity disorder and sluggish cognitive tempo throughout childhood: temporal invariance and stability from preschool through ninth grade [Texte imprimé et/ou numérique] / Daniel R. LEOPOLD, Auteur ; Micaela E. CHRISTOPHER, Auteur ; G. Leonard BURNS, Auteur ; Stephen P. BECKER, Auteur ; Richard K. OLSON, Auteur ; Erik G. WILLCUTT, Auteur . - p.1066-1074. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 57-9 (September 2016) . - p.1066-1074 Mots-clés : ADHD  attention-deficit/hyperactivity disorder  sluggish cognitive tempo  sluggish tempo  inattention  hyperactivity  stability  temporal invariance  measurement invariance Index. décimale : PER Périodiques Résumé : Background Although multiple cross-sectional studies have shown symptoms of sluggish cognitive tempo (SCT) and attention-deficit/hyperactivity disorder (ADHD) to be statistically distinct, studies have yet to examine the temporal stability and measurement invariance of SCT in a longitudinal sample. To date, only six studies have assessed SCT longitudinally, with the longest study examining SCT over a 2-year period. The overall goals of this study were to assess the 10-year longitudinal stability and interfactor relationships of ADHD and SCT symptoms among a community sample of children. Methods Confirmatory factor analysis was used to assess the temporal invariance of ADHD and SCT symptoms in a large population-based longitudinal sample (International Longitudinal Twin Study of Early Reading Development) that included children assessed at preschool and after kindergarten, first, second, fourth, and ninth grades (n = 489). Latent autoregressive models were then estimated to assess the stability of these constructs. Results Results demonstrated invariance of item loadings and intercepts from preschool through ninth grades, as well as invariance of interfactor correlations. Results further indicated that both ADHD and SCT are highly stable across these years of development, that these symptom dimensions are related but also separable, and that hyperactivity/impulsivity and SCT are both more strongly correlated with inattention than with each other and show differential developmental trajectories. Specifically, even in the presence of latent simplex analyses providing support for the developmental stability of these dimensions, linear comparisons indicated that that mean levels of hyperactivity/impulsivity decreased with time, inattentive ratings were generally stable, and SCT tended to increase slightly across development. Conclusions This study adds to the current literature by being the first to systematically assess and demonstrate the temporal invariance and stability of ADHD and SCT across a span of 10 years. En ligne : http://dx.doi.org/10.1111/jcpp.12505 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=292

Evidence for shared genetic risk between ADHD symptoms and reduced mathematics ability: a twin study / Corina U. GREVEN in Journal of Child Psychology and Psychiatry, 55-1 (January 2014)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 55-1 (January 2014) . - p.39-48 Titre : Evidence for shared genetic risk between ADHD symptoms and reduced mathematics ability: a twin study Type de document : Texte imprimé et/ou numérique Auteurs : Corina U. GREVEN, Auteur ; Yulia KOVAS, Auteur ; Erik G. WILLCUTT, Auteur ; Stephen A. PETRILL, Auteur ; Robert PLOMIN, Auteur Article en page(s) : p.39-48 Langues : Anglais (eng) Mots-clés : ADHD  mathematics  twin study  genetics  reading  general cognitive ability Index. décimale : PER Périodiques Résumé : Background Attention-deficit/hyperactivity disorder (ADHD) symptoms and mathematics ability are associated, but little is known about the genetic and environmental influences underlying this association. Methods Data came from more than 6,000 twelve-year-old twin pairs from the UK population-representative Twins Early Development Study. Parents rated each twin's behaviour using a DSM-IV-based 18-item questionnaire of inattentive and hyperactive–impulsive ADHD symptoms. Mathematics tests based on the UK National Curriculum were completed by each twin. The twins also completed standardised tests of reading and general cognitive ability. Multivariate twin model fitting was applied. Results Inattentive and hyperactive–impulsive ADHD symptoms were highly heritable (67% and 73% respectively). Mathematics ability was moderately heritable (46%). Mathematics ability and inattentiveness showed a significantly greater phenotypic correlation (rp = ?.26) and genetic correlation (rA = ?.41) than mathematics ability and hyperactivity–impulsivity (rp = ?.18; rA = ?.22). The genetic correlation between inattentiveness and mathematics ability was largely independent from hyperactivity-impulsivity, and was only partially accounted for by genetic influences related to reading and general cognitive ability. Conclusions Results revealed the novel finding that mathematics ability shows significantly stronger phenotypic and genetic associations with inattentiveness than with hyperactivity–impulsivity. Genetic associations between inattentiveness and mathematics ability could only partially be accounted for by hyperactivity–impulsivity, reading and general cognitive ability. Results suggest that mathematics ability is associated with ADHD symptoms largely because it shares genetic risk factors with inattentiveness, and provide further evidence for considering inattentiveness and hyperactivity–impulsivity separately. DNA markers for ADHD symptoms (especially inattentiveness) may also be candidate risk factors for mathematics ability and vice versa. En ligne : http://dx.doi.org/10.1111/jcpp.12090 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=220 [article] Evidence for shared genetic risk between ADHD symptoms and reduced mathematics ability: a twin study [Texte imprimé et/ou numérique] / Corina U. GREVEN, Auteur ; Yulia KOVAS, Auteur ; Erik G. WILLCUTT, Auteur ; Stephen A. PETRILL, Auteur ; Robert PLOMIN, Auteur . - p.39-48. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 55-1 (January 2014) . - p.39-48 Mots-clés : ADHD  mathematics  twin study  genetics  reading  general cognitive ability Index. décimale : PER Périodiques Résumé : Background Attention-deficit/hyperactivity disorder (ADHD) symptoms and mathematics ability are associated, but little is known about the genetic and environmental influences underlying this association. Methods Data came from more than 6,000 twelve-year-old twin pairs from the UK population-representative Twins Early Development Study. Parents rated each twin's behaviour using a DSM-IV-based 18-item questionnaire of inattentive and hyperactive–impulsive ADHD symptoms. Mathematics tests based on the UK National Curriculum were completed by each twin. The twins also completed standardised tests of reading and general cognitive ability. Multivariate twin model fitting was applied. Results Inattentive and hyperactive–impulsive ADHD symptoms were highly heritable (67% and 73% respectively). Mathematics ability was moderately heritable (46%). Mathematics ability and inattentiveness showed a significantly greater phenotypic correlation (rp = ?.26) and genetic correlation (rA = ?.41) than mathematics ability and hyperactivity–impulsivity (rp = ?.18; rA = ?.22). The genetic correlation between inattentiveness and mathematics ability was largely independent from hyperactivity-impulsivity, and was only partially accounted for by genetic influences related to reading and general cognitive ability. Conclusions Results revealed the novel finding that mathematics ability shows significantly stronger phenotypic and genetic associations with inattentiveness than with hyperactivity–impulsivity. Genetic associations between inattentiveness and mathematics ability could only partially be accounted for by hyperactivity–impulsivity, reading and general cognitive ability. Results suggest that mathematics ability is associated with ADHD symptoms largely because it shares genetic risk factors with inattentiveness, and provide further evidence for considering inattentiveness and hyperactivity–impulsivity separately. DNA markers for ADHD symptoms (especially inattentiveness) may also be candidate risk factors for mathematics ability and vice versa. En ligne : http://dx.doi.org/10.1111/jcpp.12090 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=220

Explaining the sex difference in dyslexia / Anne B. ARNETT in Journal of Child Psychology and Psychiatry, 58-6 (June 2017)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 58-6 (June 2017) . - p.719-727 Titre : Explaining the sex difference in dyslexia Type de document : Texte imprimé et/ou numérique Auteurs : Anne B. ARNETT, Auteur ; Bruce F. PENNINGTON, Auteur ; Robin L. PETERSON, Auteur ; Erik G. WILLCUTT, Auteur ; John C. DEFRIES, Auteur ; Richard K. OLSON, Auteur Article en page(s) : p.719-727 Langues : Anglais (eng) Mots-clés : Reading  dyslexia  sex difference  processing speed  inhibition  verbal reasoning Index. décimale : PER Périodiques Résumé : Background Males are diagnosed with dyslexia more frequently than females, even in epidemiological samples. This may be explained by greater variance in males’ reading performance. Methods We expand on previous research by rigorously testing the variance difference theory, and testing for mediation of the sex difference by cognitive correlates. We developed an analytic framework that can be applied to group differences in any psychiatric disorder. Results Males’ overrepresentation in the low performance tail of the reading distribution was accounted for by mean and variance differences across sex. There was no sex difference at the high performance tail. Processing speed (PS) and inhibitory control partially mediated the sex difference. Verbal reasoning emerged as a strength in males. Conclusions Our results complement a previous finding that PS partially mediates the sex difference in symptoms of attention deficit/hyperactivity disorder (ADHD), and helps explain the sex difference in both dyslexia and ADHD and their comorbidity. En ligne : http://dx.doi.org/10.1111/jcpp.12691 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=308 [article] Explaining the sex difference in dyslexia [Texte imprimé et/ou numérique] / Anne B. ARNETT, Auteur ; Bruce F. PENNINGTON, Auteur ; Robin L. PETERSON, Auteur ; Erik G. WILLCUTT, Auteur ; John C. DEFRIES, Auteur ; Richard K. OLSON, Auteur . - p.719-727. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 58-6 (June 2017) . - p.719-727 Mots-clés : Reading  dyslexia  sex difference  processing speed  inhibition  verbal reasoning Index. décimale : PER Périodiques Résumé : Background Males are diagnosed with dyslexia more frequently than females, even in epidemiological samples. This may be explained by greater variance in males’ reading performance. Methods We expand on previous research by rigorously testing the variance difference theory, and testing for mediation of the sex difference by cognitive correlates. We developed an analytic framework that can be applied to group differences in any psychiatric disorder. Results Males’ overrepresentation in the low performance tail of the reading distribution was accounted for by mean and variance differences across sex. There was no sex difference at the high performance tail. Processing speed (PS) and inhibitory control partially mediated the sex difference. Verbal reasoning emerged as a strength in males. Conclusions Our results complement a previous finding that PS partially mediates the sex difference in symptoms of attention deficit/hyperactivity disorder (ADHD), and helps explain the sex difference in both dyslexia and ADHD and their comorbidity. En ligne : http://dx.doi.org/10.1111/jcpp.12691 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=308

Extending the ‘cross-disorder’ relevance of executive functions to dimensional neuropsychiatric traits in youth / Lauren M. MCGRATH in Journal of Child Psychology and Psychiatry, 57-4 (April 2016)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 57-4 (April 2016) . - p.462-471 Titre : Extending the ‘cross-disorder’ relevance of executive functions to dimensional neuropsychiatric traits in youth Type de document : Texte imprimé et/ou numérique Auteurs : Lauren M. MCGRATH, Auteur ; Ellen B. BRAATEN, Auteur ; Nathan D. DOTY, Auteur ; Brian L. WILLOUGHBY, Auteur ; H. Kent WILSON, Auteur ; Ellen H. O'DONNELL, Auteur ; Mary K. COLVIN, Auteur ; Hillary L. DITMARS, Auteur ; Jessica E. BLAIS, Auteur ; Erin N. HILL, Auteur ; Aaron METZGER, Auteur ; Roy H. PERLIS, Auteur ; Erik G. WILLCUTT, Auteur ; Jordan W. SMOLLER, Auteur ; Irwin D. WALDMAN, Auteur ; Stephen V. FARAONE, Auteur ; Larry J. SEIDMAN, Auteur ; Alysa E. DOYLE, Auteur Article en page(s) : p.462-471 Langues : Anglais (eng) Mots-clés : Executive functions  mania  psychosis  social responsiveness  cross-disorder  dimensional traits Index. décimale : PER Périodiques Résumé : Background Evidence that different neuropsychiatric conditions share genetic liability has increased interest in phenotypes with ‘cross-disorder’ relevance, as they may contribute to revised models of psychopathology. Cognition is a promising construct for study; yet, evidence that the same cognitive functions are impaired across different forms of psychopathology comes primarily from separate studies of individual categorical diagnoses versus controls. Given growing support for dimensional models that cut across traditional diagnostic boundaries, we aimed to determine, within a single cohort, whether performance on measures of executive functions (EFs) predicted dimensions of different psychopathological conditions known to share genetic liability. Methods Data are from 393 participants, ages 8–17, consecutively enrolled in the Longitudinal Study of Genetic Influences on Cognition (LOGIC). This project is conducting deep phenotyping and genomic analyses in youth referred for neuropsychiatric evaluation. Using structural equation modeling, we examined whether EFs predicted variation in core dimensions of the autism spectrum disorder, bipolar illness, and schizophrenia (including social responsiveness, mania/emotion regulation, and positive symptoms of psychosis, respectively). Results We modeled three cognitive factors (working memory, shifting, and executive processing speed) that loaded on a second-order EF factor. The EF factor predicted variation in our three target traits, but not in a negative control (somatization). Moreover, this EF factor was primarily associated with the overlapping (rather than unique) variance across the three outcome measures, suggesting that it related to a general increase in psychopathology symptoms across those dimensions. Conclusions Findings extend support for the relevance of cognition to neuropsychiatric conditions that share underlying genetic risk. They suggest that higher-order cognition, including EFs, relates to the dimensional spectrum of each of these disorders and not just the clinical diagnoses. Moreover, results have implications for bottom-up models linking genes, cognition, and a general psychopathology liability. En ligne : http://dx.doi.org/10.1111/jcpp.12463 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=285 [article] Extending the ‘cross-disorder’ relevance of executive functions to dimensional neuropsychiatric traits in youth [Texte imprimé et/ou numérique] / Lauren M. MCGRATH, Auteur ; Ellen B. BRAATEN, Auteur ; Nathan D. DOTY, Auteur ; Brian L. WILLOUGHBY, Auteur ; H. Kent WILSON, Auteur ; Ellen H. O'DONNELL, Auteur ; Mary K. COLVIN, Auteur ; Hillary L. DITMARS, Auteur ; Jessica E. BLAIS, Auteur ; Erin N. HILL, Auteur ; Aaron METZGER, Auteur ; Roy H. PERLIS, Auteur ; Erik G. WILLCUTT, Auteur ; Jordan W. SMOLLER, Auteur ; Irwin D. WALDMAN, Auteur ; Stephen V. FARAONE, Auteur ; Larry J. SEIDMAN, Auteur ; Alysa E. DOYLE, Auteur . - p.462-471. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 57-4 (April 2016) . - p.462-471 Mots-clés : Executive functions  mania  psychosis  social responsiveness  cross-disorder  dimensional traits Index. décimale : PER Périodiques Résumé : Background Evidence that different neuropsychiatric conditions share genetic liability has increased interest in phenotypes with ‘cross-disorder’ relevance, as they may contribute to revised models of psychopathology. Cognition is a promising construct for study; yet, evidence that the same cognitive functions are impaired across different forms of psychopathology comes primarily from separate studies of individual categorical diagnoses versus controls. Given growing support for dimensional models that cut across traditional diagnostic boundaries, we aimed to determine, within a single cohort, whether performance on measures of executive functions (EFs) predicted dimensions of different psychopathological conditions known to share genetic liability. Methods Data are from 393 participants, ages 8–17, consecutively enrolled in the Longitudinal Study of Genetic Influences on Cognition (LOGIC). This project is conducting deep phenotyping and genomic analyses in youth referred for neuropsychiatric evaluation. Using structural equation modeling, we examined whether EFs predicted variation in core dimensions of the autism spectrum disorder, bipolar illness, and schizophrenia (including social responsiveness, mania/emotion regulation, and positive symptoms of psychosis, respectively). Results We modeled three cognitive factors (working memory, shifting, and executive processing speed) that loaded on a second-order EF factor. The EF factor predicted variation in our three target traits, but not in a negative control (somatization). Moreover, this EF factor was primarily associated with the overlapping (rather than unique) variance across the three outcome measures, suggesting that it related to a general increase in psychopathology symptoms across those dimensions. Conclusions Findings extend support for the relevance of cognition to neuropsychiatric conditions that share underlying genetic risk. They suggest that higher-order cognition, including EFs, relates to the dimensional spectrum of each of these disorders and not just the clinical diagnoses. Moreover, results have implications for bottom-up models linking genes, cognition, and a general psychopathology liability. En ligne : http://dx.doi.org/10.1111/jcpp.12463 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=285

Gene by environment interactions influencing reading disability and the inattentive symptom dimension of attention deficit/hyperactivity disorder / Jenni ROSENBERG in Journal of Child Psychology and Psychiatry, 53-3 (March 2012)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 53-3 (March 2012) . - p.243-251 Titre : Gene by environment interactions influencing reading disability and the inattentive symptom dimension of attention deficit/hyperactivity disorder Type de document : Texte imprimé et/ou numérique Auteurs : Jenni ROSENBERG, Auteur ; Bruce F. PENNINGTON, Auteur ; Erik G. WILLCUTT, Auteur ; Richard K. OLSON, Auteur Année de publication : 2012 Article en page(s) : p.243-251 Langues : Anglais (eng) Mots-clés : Gene  environment  interactions  reading disability  attention deficit/hyperactivity disorder  bioecological  diathesis-stress Index. décimale : PER Périodiques Résumé : Background:  Reading disability (RD) and attention deficit/hyperactivity disorder (ADHD) are comorbid and genetically correlated, especially the inattentive dimension of ADHD (ADHD-I). However, previous research indicates that RD and ADHD enter into opposite gene by environment (G × E) interactions. Methods:  This study used behavioral genetic methods to replicate these opposite G × E interactions in a sample of same-sex monozygotic and dizygotic twin pairs from the Colorado Learning Disabilities Research Center (CLDRC; DeFries et al., 1997) and to test a genetic hypothesis for why these opposite interactions occur. Results:  We replicated opposite G × E interactions for RD (bioecological) and ADHD-I (diathesis-stress) with parental education in the same sample of participants. The genetic hypothesis for this opposite pattern of interactions is that only genes specific to each disorder enter into these opposite interactions, not the shared genes underlying their comorbidity. To test this hypothesis, we used single models with an exploratory three-way interaction, in which the G × E interactions for each disorder were moderated by comorbidity. Neither three-way interaction was significant. The heritability of RD did not vary as a function of parental education and ADHD-I. Similarly, the heritability of ADHD-I did not vary as a function of parental education and RD. Conclusions:  We documented opposite G × E interactions in RD and ADHD-I in the same overall twin sample, but the explanation for this apparent paradox remains unclear. Examining specific genes and more specific environmental factors may help resolve the paradox. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2011.02452.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=152 [article] Gene by environment interactions influencing reading disability and the inattentive symptom dimension of attention deficit/hyperactivity disorder [Texte imprimé et/ou numérique] / Jenni ROSENBERG, Auteur ; Bruce F. PENNINGTON, Auteur ; Erik G. WILLCUTT, Auteur ; Richard K. OLSON, Auteur . - 2012 . - p.243-251. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 53-3 (March 2012) . - p.243-251 Mots-clés : Gene  environment  interactions  reading disability  attention deficit/hyperactivity disorder  bioecological  diathesis-stress Index. décimale : PER Périodiques Résumé : Background:  Reading disability (RD) and attention deficit/hyperactivity disorder (ADHD) are comorbid and genetically correlated, especially the inattentive dimension of ADHD (ADHD-I). However, previous research indicates that RD and ADHD enter into opposite gene by environment (G × E) interactions. Methods:  This study used behavioral genetic methods to replicate these opposite G × E interactions in a sample of same-sex monozygotic and dizygotic twin pairs from the Colorado Learning Disabilities Research Center (CLDRC; DeFries et al., 1997) and to test a genetic hypothesis for why these opposite interactions occur. Results:  We replicated opposite G × E interactions for RD (bioecological) and ADHD-I (diathesis-stress) with parental education in the same sample of participants. The genetic hypothesis for this opposite pattern of interactions is that only genes specific to each disorder enter into these opposite interactions, not the shared genes underlying their comorbidity. To test this hypothesis, we used single models with an exploratory three-way interaction, in which the G × E interactions for each disorder were moderated by comorbidity. Neither three-way interaction was significant. The heritability of RD did not vary as a function of parental education and ADHD-I. Similarly, the heritability of ADHD-I did not vary as a function of parental education and RD. Conclusions:  We documented opposite G × E interactions in RD and ADHD-I in the same overall twin sample, but the explanation for this apparent paradox remains unclear. Examining specific genes and more specific environmental factors may help resolve the paradox. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2011.02452.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=152

Gene × Environment interactions in speech sound disorder predict language and preliteracy outcomes / Lauren M. MCGRATH in Development and Psychopathology, 19-4 (Fall 2007)  

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A multiple deficit model of reading disability and attention-deficit/hyperactivity disorder: searching for shared cognitive deficits / Lauren M. MCGRATH in Journal of Child Psychology and Psychiatry, 52-5 (May 2011)  

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Neuropsychological functioning in childhood-onset psychosis and attention-deficit/hyperactivity disorder / Kimberly BRODSKY in Journal of Child Psychology and Psychiatry, 55-7 (July 2014)  

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Predictive Validity of a Continuous Alternative to Nominal Subtypes of Attention-Deficit/Hyperactivity Disorder for DSM-V / Benjamin B. LAHEY in Journal of Clinical Child & Adolescent Psychology, 39-6 (November-December 2010)  

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Psychiatric Comorbidity in Children and Adolescents with Reading Disability / Erik G. WILLCUTT in Journal of Child Psychology and Psychiatry, 41-8 (November 2000)

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Sex differences in ADHD symptom severity / Anne B. ARNETT in Journal of Child Psychology and Psychiatry, 56-6 (June 2015)  

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