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Auteur Daniel R. LEOPOLD
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Documents disponibles écrits par cet auteur (2)
Faire une suggestion Affiner la rechercheAttention-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)
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[article]
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 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
in Journal of Child Psychology and Psychiatry > 57-9 (September 2016) . - p.1066-1074[article] Attention-deficit/hyperactivity disorder and sluggish cognitive tempo throughout childhood: temporal invariance and stability from preschool through ninth grade [texte imprimé] / 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 Differential impact of trait sluggish cognitive tempo and ADHD inattention in early childhood on adolescent functioning / Stephen P. BECKER in Journal of Child Psychology and Psychiatry, 59-10 (October 2018)
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[article]
Titre : Differential impact of trait sluggish cognitive tempo and ADHD inattention in early childhood on adolescent functioning Type de document : texte imprimé Auteurs : Stephen P. BECKER, Auteur ; G. Leonard BURNS, Auteur ; Daniel R. LEOPOLD, Auteur ; Richard K. OLSON, Auteur ; Erik G. WILLCUTT, Auteur Article en page(s) : p.1094-1104 Langues : Anglais (eng) Mots-clés : Adhd academic achievement attention-deficit/hyperactivity disorder comorbidity processing speed sluggish cognitive tempo working memory Index. décimale : PER Périodiques Résumé : BACKGROUND: Sluggish cognitive tempo (SCT) is distinct from attention-deficit/hyperactivity disorder inattention (ADHD-IN) and concurrently associated with a range of impairment domains. However, few longitudinal studies have examined SCT as a longitudinal predictor of adjustment. Studies to date have all used a relatively short longitudinal time span (6 months to 2 years) and only rating scale measures of adjustment. Using a prospective, multi-method design, this study examined whether SCT and ADHD-IN were differentially associated with functioning over a 10-year period between preschool and the end of ninth grade. METHODS: Latent state-trait modeling determined the trait variance (i.e. consistency across occasions) of SCT and ADHD-IN across four measurement points (preschool and the end of kindergarten, first grade, and second grade) in a large population-based longitudinal sample (N = 976). Regression analyses were used to examine trait SCT and ADHD-IN factors in early childhood as predictors of functioning at the end of ninth grade (i.e. parent ratings of psychopathology and social/academic functioning, reading and mathematics academic achievement scores, processing speed and working memory). RESULTS: Both SCT and ADHD-IN contained more trait variance (Ms = 65% and 61%, respectively) than occasion-specific variance (Ms = 35% and 39%) in early childhood, with trait variance increasing as children progressed from preschool through early elementary school. In regression analyses: (a) SCT significantly predicted greater withdrawal and anxiety/depression whereas ADHD-IN did not uniquely predict these internalizing domains; (b) ADHD-IN uniquely predicted more externalizing behaviors whereas SCT uniquely predicted fewer externalizing behaviors; (c) SCT uniquely predicted shyness whereas both SCT and ADHD-IN uniquely predicted global social difficulties; and (d) ADHD-IN uniquely predicted poorer math achievement and slower processing speed whereas SCT more consistently predicted poorer reading achievement. CONCLUSIONS: Findings of this study - from the longest prospective sample to date - provide the clearest evidence yet that SCT and ADHD-IN often differ when it comes to the functional outcomes they predict. En ligne : http://dx.doi.org/10.1111/jcpp.12946 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=369
in Journal of Child Psychology and Psychiatry > 59-10 (October 2018) . - p.1094-1104[article] Differential impact of trait sluggish cognitive tempo and ADHD inattention in early childhood on adolescent functioning [texte imprimé] / Stephen P. BECKER, Auteur ; G. Leonard BURNS, Auteur ; Daniel R. LEOPOLD, Auteur ; Richard K. OLSON, Auteur ; Erik G. WILLCUTT, Auteur . - p.1094-1104.
Langues : Anglais (eng)
in Journal of Child Psychology and Psychiatry > 59-10 (October 2018) . - p.1094-1104
Mots-clés : Adhd academic achievement attention-deficit/hyperactivity disorder comorbidity processing speed sluggish cognitive tempo working memory Index. décimale : PER Périodiques Résumé : BACKGROUND: Sluggish cognitive tempo (SCT) is distinct from attention-deficit/hyperactivity disorder inattention (ADHD-IN) and concurrently associated with a range of impairment domains. However, few longitudinal studies have examined SCT as a longitudinal predictor of adjustment. Studies to date have all used a relatively short longitudinal time span (6 months to 2 years) and only rating scale measures of adjustment. Using a prospective, multi-method design, this study examined whether SCT and ADHD-IN were differentially associated with functioning over a 10-year period between preschool and the end of ninth grade. METHODS: Latent state-trait modeling determined the trait variance (i.e. consistency across occasions) of SCT and ADHD-IN across four measurement points (preschool and the end of kindergarten, first grade, and second grade) in a large population-based longitudinal sample (N = 976). Regression analyses were used to examine trait SCT and ADHD-IN factors in early childhood as predictors of functioning at the end of ninth grade (i.e. parent ratings of psychopathology and social/academic functioning, reading and mathematics academic achievement scores, processing speed and working memory). RESULTS: Both SCT and ADHD-IN contained more trait variance (Ms = 65% and 61%, respectively) than occasion-specific variance (Ms = 35% and 39%) in early childhood, with trait variance increasing as children progressed from preschool through early elementary school. In regression analyses: (a) SCT significantly predicted greater withdrawal and anxiety/depression whereas ADHD-IN did not uniquely predict these internalizing domains; (b) ADHD-IN uniquely predicted more externalizing behaviors whereas SCT uniquely predicted fewer externalizing behaviors; (c) SCT uniquely predicted shyness whereas both SCT and ADHD-IN uniquely predicted global social difficulties; and (d) ADHD-IN uniquely predicted poorer math achievement and slower processing speed whereas SCT more consistently predicted poorer reading achievement. CONCLUSIONS: Findings of this study - from the longest prospective sample to date - provide the clearest evidence yet that SCT and ADHD-IN often differ when it comes to the functional outcomes they predict. En ligne : http://dx.doi.org/10.1111/jcpp.12946 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=369

