Annual Research Review: Reaction time variability in ADHD and autism spectrum disorders: measurement and mechanisms of a proposed trans-diagnostic phenotype / Sarah L. KARALUNAS in Journal of Child Psychology and Psychiatry, 55-6 (June 2014)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 55-6 (June 2014) . - p.685-710 Titre : Annual Research Review: Reaction time variability in ADHD and autism spectrum disorders: measurement and mechanisms of a proposed trans-diagnostic phenotype Type de document : Texte imprimé et/ou numérique Auteurs : Sarah L. KARALUNAS, Auteur ; Hilde M. GEURTS, Auteur ; Kerstin KONRAD, Auteur ; Stephan BENDER, Auteur ; Joel T. NIGG, Auteur Année de publication : 2014 Article en page(s) : p.685-710 Langues : Anglais (eng) Mots-clés : Reaction time variability  intraindividual  ADHD  ASD  trans-diagnostic phenotype  biomarker Index. décimale : PER Périodiques Résumé : Background Intraindividual variability in reaction time (RT) has received extensive discussion as an indicator of cognitive performance, a putative intermediate phenotype of many clinical disorders, and a possible trans-diagnostic phenotype that may elucidate shared risk factors for mechanisms of psychiatric illnesses. Scope and Methodology Using the examples of attention deficit hyperactivity disorder (ADHD) and autism spectrum disorders (ASD), we discuss RT variability. We first present a new meta-analysis of RT variability in ASD with and without comorbid ADHD. We then discuss potential mechanisms that may account for RT variability and statistical models that disentangle the cognitive processes affecting RTs. We then report a second meta-analysis comparing ADHD and non-ADHD children on diffusion model parameters. We consider how findings inform the search for neural correlates of RT variability. Findings Results suggest that RT variability is increased in ASD only when children with comorbid ADHD are included in the sample. Furthermore, RT variability in ADHD is explained by moderate to large increases (d = 0.63–0.99) in the ex-Gaussian parameter ? and the diffusion parameter drift rate, as well as by smaller differences (d = 0.32) in the diffusion parameter of nondecision time. The former may suggest problems in state regulation or arousal and difficulty detecting signal from noise, whereas the latter may reflect contributions from deficits in motor organization or output. The neuroimaging literature converges with this multicomponent interpretation and also highlights the role of top-down control circuits. Conclusion We underscore the importance of considering the interactions between top-down control, state regulation (e.g. arousal), and motor preparation when interpreting RT variability and conclude that decomposition of the RT signal provides superior interpretive power and suggests mechanisms convergent with those implicated using other cognitive paradigms. We conclude with specific recommendations for the field for next steps in the study of RT variability in neurodevelopmental disorders. En ligne : http://dx.doi.org/10.1111/jcpp.12217 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=234 [article] Annual Research Review: Reaction time variability in ADHD and autism spectrum disorders: measurement and mechanisms of a proposed trans-diagnostic phenotype [Texte imprimé et/ou numérique] / Sarah L. KARALUNAS, Auteur ; Hilde M. GEURTS, Auteur ; Kerstin KONRAD, Auteur ; Stephan BENDER, Auteur ; Joel T. NIGG, Auteur . - 2014 . - p.685-710. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 55-6 (June 2014) . - p.685-710 Mots-clés : Reaction time variability  intraindividual  ADHD  ASD  trans-diagnostic phenotype  biomarker Index. décimale : PER Périodiques Résumé : Background Intraindividual variability in reaction time (RT) has received extensive discussion as an indicator of cognitive performance, a putative intermediate phenotype of many clinical disorders, and a possible trans-diagnostic phenotype that may elucidate shared risk factors for mechanisms of psychiatric illnesses. Scope and Methodology Using the examples of attention deficit hyperactivity disorder (ADHD) and autism spectrum disorders (ASD), we discuss RT variability. We first present a new meta-analysis of RT variability in ASD with and without comorbid ADHD. We then discuss potential mechanisms that may account for RT variability and statistical models that disentangle the cognitive processes affecting RTs. We then report a second meta-analysis comparing ADHD and non-ADHD children on diffusion model parameters. We consider how findings inform the search for neural correlates of RT variability. Findings Results suggest that RT variability is increased in ASD only when children with comorbid ADHD are included in the sample. Furthermore, RT variability in ADHD is explained by moderate to large increases (d = 0.63–0.99) in the ex-Gaussian parameter ? and the diffusion parameter drift rate, as well as by smaller differences (d = 0.32) in the diffusion parameter of nondecision time. The former may suggest problems in state regulation or arousal and difficulty detecting signal from noise, whereas the latter may reflect contributions from deficits in motor organization or output. The neuroimaging literature converges with this multicomponent interpretation and also highlights the role of top-down control circuits. Conclusion We underscore the importance of considering the interactions between top-down control, state regulation (e.g. arousal), and motor preparation when interpreting RT variability and conclude that decomposition of the RT signal provides superior interpretive power and suggests mechanisms convergent with those implicated using other cognitive paradigms. We conclude with specific recommendations for the field for next steps in the study of RT variability in neurodevelopmental disorders. En ligne : http://dx.doi.org/10.1111/jcpp.12217 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=234

Evaluating chronic emotional dysregulation and irritability in relation to ADHD and depression genetic risk in children with ADHD / Joel T. NIGG in Journal of Child Psychology and Psychiatry, 61-2 (February 2020)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 61-2 (February 2020) . - p.205-214 Titre : Evaluating chronic emotional dysregulation and irritability in relation to ADHD and depression genetic risk in children with ADHD Type de document : Texte imprimé et/ou numérique Auteurs : Joel T. NIGG, Auteur ; Sarah L. KARALUNAS, Auteur ; Hanna C. GUSTAFSSON, Auteur ; Priya BHATT, Auteur ; Peter RYABININ, Auteur ; Michael A. MOONEY, Auteur ; Stephen V. FARAONE, Auteur ; Damien A. FAIR, Auteur ; Beth WILMOT, Auteur Article en page(s) : p.205-214 Langues : Anglais (eng) Mots-clés : Adhd  irritability  polygenic score  temperament Index. décimale : PER Périodiques Résumé : BACKGROUND: A central nosological problem concerns the etiological relationship of emotional dysregulation with ADHD. Molecular genetic risk scores provide a novel method for informing this question. METHODS: Participants were 514 community-recruited children of Northern European descent age 7-11 defined as ADHD or non-ADHD by detailed research evaluation. Parents-rated ADHD on standardized ratings and child temperament on the Temperament in Middle Childhood Questionnaire (TMCQ) and reported on ADHD and comorbid disorders by semi-structured clinical interview. Categorical and dimensional variables were created for ADHD, emotional dysregulation (implicating disruption of regulation of both anger-irritability and of positive valence surgency-sensation seeking), and irritability alone (anger dysregulation). Genome-wide polygenic risk scores (PRS) were computed for ADHD and depression genetic liability. Structural equation models and computationally derived emotion profiles guided analysis. RESULTS: The ADHD PRS was associated in variable-centered analyses with irritability (beta = .179, 95% CI = 0.087-0.280; DeltaR(2) = .034, p < .0002), but also with surgency/sensation seeking (B = .146, 95%CI = 0.052-0.240, DeltaR(2) =.022, p = .002). In person-centered analysis, the ADHD PRS was elevated in the emotion dysregulation ADHD group versus other ADHD children (OR = 1.44, 95% CI = 1.03-2.20, Nagelkerke DeltaR(2) = .013, p = .033) but did not differentiate irritable from surgent ADHD profiles. All effects were independent of variation in ADHD severity across traits or groups. The depression PRS was related to oppositional defiant disorder but not to ADHD emotion dysregulation. CONCLUSIONS: Irritability-anger and surgency-sensation seeking, as forms of negative and positively valenced dysregulated affect in ADHD populations, both relate principally to ADHD genetic risk and not mood-related genetic risk. En ligne : http://dx.doi.org/10.1111/jcpp.13132 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=415 [article] Evaluating chronic emotional dysregulation and irritability in relation to ADHD and depression genetic risk in children with ADHD [Texte imprimé et/ou numérique] / Joel T. NIGG, Auteur ; Sarah L. KARALUNAS, Auteur ; Hanna C. GUSTAFSSON, Auteur ; Priya BHATT, Auteur ; Peter RYABININ, Auteur ; Michael A. MOONEY, Auteur ; Stephen V. FARAONE, Auteur ; Damien A. FAIR, Auteur ; Beth WILMOT, Auteur . - p.205-214. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 61-2 (February 2020) . - p.205-214 Mots-clés : Adhd  irritability  polygenic score  temperament Index. décimale : PER Périodiques Résumé : BACKGROUND: A central nosological problem concerns the etiological relationship of emotional dysregulation with ADHD. Molecular genetic risk scores provide a novel method for informing this question. METHODS: Participants were 514 community-recruited children of Northern European descent age 7-11 defined as ADHD or non-ADHD by detailed research evaluation. Parents-rated ADHD on standardized ratings and child temperament on the Temperament in Middle Childhood Questionnaire (TMCQ) and reported on ADHD and comorbid disorders by semi-structured clinical interview. Categorical and dimensional variables were created for ADHD, emotional dysregulation (implicating disruption of regulation of both anger-irritability and of positive valence surgency-sensation seeking), and irritability alone (anger dysregulation). Genome-wide polygenic risk scores (PRS) were computed for ADHD and depression genetic liability. Structural equation models and computationally derived emotion profiles guided analysis. RESULTS: The ADHD PRS was associated in variable-centered analyses with irritability (beta = .179, 95% CI = 0.087-0.280; DeltaR(2) = .034, p < .0002), but also with surgency/sensation seeking (B = .146, 95%CI = 0.052-0.240, DeltaR(2) =.022, p = .002). In person-centered analysis, the ADHD PRS was elevated in the emotion dysregulation ADHD group versus other ADHD children (OR = 1.44, 95% CI = 1.03-2.20, Nagelkerke DeltaR(2) = .013, p = .033) but did not differentiate irritable from surgent ADHD profiles. All effects were independent of variation in ADHD severity across traits or groups. The depression PRS was related to oppositional defiant disorder but not to ADHD emotion dysregulation. CONCLUSIONS: Irritability-anger and surgency-sensation seeking, as forms of negative and positively valenced dysregulated affect in ADHD populations, both relate principally to ADHD genetic risk and not mood-related genetic risk. En ligne : http://dx.doi.org/10.1111/jcpp.13132 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=415

Examining Relationships Between Executive Functioning and Delay Aversion in Attention Deficit Hyperactivity Disorder / Sarah L. KARALUNAS in Journal of Clinical Child & Adolescent Psychology, 40-6 (November-December 2011)  

Public ISBD [article]  inJournal of Clinical Child & Adolescent Psychology > 40-6 (November-December 2011) . - p.837-847 Titre : Examining Relationships Between Executive Functioning and Delay Aversion in Attention Deficit Hyperactivity Disorder Type de document : Texte imprimé et/ou numérique Auteurs : Sarah L. KARALUNAS, Auteur ; Cynthia L. HUANG-POLLOCK, Auteur Année de publication : 2011 Article en page(s) : p.837-847 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : Although motivation and cognition are often examined separately, recent theory suggests that a delay-averse motivational style may negatively impact development of executive functions (EFs), such as working memory (WM) and response inhibition (RI) for children with Attention Deficit Hyperactivity Disorder (ADHD; Sonuga-Barke, 200259. Sonuga-Barke , E. ( 2002 ). Psychological heterogeneity in AD/HD—A dual pathway model of behaviour and cognition . Behavioural Brain Research , 130 ( 1–2 ), 29 – 36 . [CrossRef], [PubMed], [Web of Science ®], [CSA] View all references). This model predicts that performance on delay aversion and EF tasks should be correlated for school-age children with ADHD. However, tests of these relationships remain sparse. Forty-five children ages 8 to 12 with ADHD and 46 non-ADHD controls completed tasks measuring EFs and delay aversion. Children with ADHD had poorer WM and RI than non-ADHD controls, as well as nonsignificantly worse delay aversion. Consistent with previous research, RI was not related to delay aversion. However, delay aversion did predict WM scores for children with and without ADHD. Implications for the dual-pathway hypothesis and future research on cognitive and motivational processing in ADHD are discussed. En ligne : http://dx.doi.org/10.1080/15374416.2011.614578 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=146 [article] Examining Relationships Between Executive Functioning and Delay Aversion in Attention Deficit Hyperactivity Disorder [Texte imprimé et/ou numérique] / Sarah L. KARALUNAS, Auteur ; Cynthia L. HUANG-POLLOCK, Auteur . - 2011 . - p.837-847. Langues : Anglais (eng) in Journal of Clinical Child & Adolescent Psychology > 40-6 (November-December 2011) . - p.837-847 Index. décimale : PER Périodiques Résumé : Although motivation and cognition are often examined separately, recent theory suggests that a delay-averse motivational style may negatively impact development of executive functions (EFs), such as working memory (WM) and response inhibition (RI) for children with Attention Deficit Hyperactivity Disorder (ADHD; Sonuga-Barke, 200259. Sonuga-Barke , E. ( 2002 ). Psychological heterogeneity in AD/HD—A dual pathway model of behaviour and cognition . Behavioural Brain Research , 130 ( 1–2 ), 29 – 36 . [CrossRef], [PubMed], [Web of Science ®], [CSA] View all references). This model predicts that performance on delay aversion and EF tasks should be correlated for school-age children with ADHD. However, tests of these relationships remain sparse. Forty-five children ages 8 to 12 with ADHD and 46 non-ADHD controls completed tasks measuring EFs and delay aversion. Children with ADHD had poorer WM and RI than non-ADHD controls, as well as nonsignificantly worse delay aversion. Consistent with previous research, RI was not related to delay aversion. However, delay aversion did predict WM scores for children with and without ADHD. Implications for the dual-pathway hypothesis and future research on cognitive and motivational processing in ADHD are discussed. En ligne : http://dx.doi.org/10.1080/15374416.2011.614578 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=146

Is reaction time variability in ADHD mainly at low frequencies? / Sarah L. KARALUNAS in Journal of Child Psychology and Psychiatry, 54-5 (May 2013)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 54-5 (May 2013) . - p.536-544 Titre : Is reaction time variability in ADHD mainly at low frequencies? Type de document : Texte imprimé et/ou numérique Auteurs : Sarah L. KARALUNAS, Auteur ; Cynthia L. HUANG-POLLOCK, Auteur ; Joel T. NIGG, Auteur Article en page(s) : p.536-544 Langues : Anglais (eng) Mots-clés : ADHD intraindividual variability  reaction time variability  default network Index. décimale : PER Périodiques Résumé : Background: Intraindividual variability in reaction times (RT variability) has garnered increasing interest as an indicator of cognitive and neurobiological dysfunction in children with attention deficit hyperactivity disorder (ADHD). Recent theory and research has emphasized specific low-frequency patterns of RT variability. However, whether group differences are specific to low frequencies is not well examined. Method: Two studies are presented. The first is a quantitative review of seven previously published studies that have examined patterns of RT variability in ADHD. The second provides new data from a substantially larger sample of children than in prior studies (NControl = 42; NADHD = 123). The children completed a choice RT task as part of a traditional go/stop task. Fast-Fourier transform analyses were applied to assess patterns of variability. Results: Quantitative review of previous studies indicated that children with ADHD demonstrate more low-frequency variability than non-ADHD controls (Hedge’s g = .39; 95% CI: .16–.62), but an equivalent excess variability in a faster frequency comparison band (g = .36; 95% CI: .03–.69), with a trivial and nonsignificant difference between ESs in each band. New data replicated results of the quantitative review with nearly identical effects in the low-frequency (g = .39; 95% CI: .05–.75) and faster frequency comparison bands (g = .40; 95% CI: .04–.74) and no evidence of diagnosis × frequency interaction (p = .954). Conclusions: Results suggest that theories of RT variability in ADHD that focus on low-frequency variability will need to be modified to account for the presence of variability at a broader range of frequencies. En ligne : http://dx.doi.org/10.1111/jcpp.12028 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=196 [article] Is reaction time variability in ADHD mainly at low frequencies? [Texte imprimé et/ou numérique] / Sarah L. KARALUNAS, Auteur ; Cynthia L. HUANG-POLLOCK, Auteur ; Joel T. NIGG, Auteur . - p.536-544. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 54-5 (May 2013) . - p.536-544 Mots-clés : ADHD intraindividual variability  reaction time variability  default network Index. décimale : PER Périodiques Résumé : Background: Intraindividual variability in reaction times (RT variability) has garnered increasing interest as an indicator of cognitive and neurobiological dysfunction in children with attention deficit hyperactivity disorder (ADHD). Recent theory and research has emphasized specific low-frequency patterns of RT variability. However, whether group differences are specific to low frequencies is not well examined. Method: Two studies are presented. The first is a quantitative review of seven previously published studies that have examined patterns of RT variability in ADHD. The second provides new data from a substantially larger sample of children than in prior studies (NControl = 42; NADHD = 123). The children completed a choice RT task as part of a traditional go/stop task. Fast-Fourier transform analyses were applied to assess patterns of variability. Results: Quantitative review of previous studies indicated that children with ADHD demonstrate more low-frequency variability than non-ADHD controls (Hedge’s g = .39; 95% CI: .16–.62), but an equivalent excess variability in a faster frequency comparison band (g = .36; 95% CI: .03–.69), with a trivial and nonsignificant difference between ESs in each band. New data replicated results of the quantitative review with nearly identical effects in the low-frequency (g = .39; 95% CI: .05–.75) and faster frequency comparison bands (g = .40; 95% CI: .04–.74) and no evidence of diagnosis × frequency interaction (p = .954). Conclusions: Results suggest that theories of RT variability in ADHD that focus on low-frequency variability will need to be modified to account for the presence of variability at a broader range of frequencies. En ligne : http://dx.doi.org/10.1111/jcpp.12028 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=196

Longitudinal network model of the co-development of temperament, executive functioning, and psychopathology symptoms in youth with and without ADHD / Sarah L. KARALUNAS in Development and Psychopathology, 33-5 (December 2021)  

Public ISBD [article]  inDevelopment and Psychopathology > 33-5 (December 2021) . - p.1803-1820 Titre : Longitudinal network model of the co-development of temperament, executive functioning, and psychopathology symptoms in youth with and without ADHD Type de document : Texte imprimé et/ou numérique Auteurs : Sarah L. KARALUNAS, Auteur ; Dylan ANTOVICH, Auteur ; Patrick K. GOH, Auteur ; Michelle M. MARTEL, Auteur ; Jessica TIPSORD, Auteur ; Elizabeth K. NOUSEN, Auteur ; Joel T. NIGG, Auteur Article en page(s) : p.1803-1820 Langues : Anglais (eng) Mots-clés : ADHD  executive functioning  longitudinal network  RDoC  temperament  transdiagnostic risk Index. décimale : PER Périodiques Résumé : Attention-deficit hyperactivity disorder (ADHD) is a common, chronic, and impairing disorder, yet presentations of ADHD and clinical course are highly heterogeneous. Despite substantial research efforts, both (a) the secondary co-occurrence of ADHD and complicating additional clinical problems and (b) the developmental pathways leading toward or away from recovery through adolescence remain poorly understood. Resolving these requires accounting for transactional influences of a large number of features across development. Here, we applied a longitudinal cross-lagged panel network model to a multimodal, multilevel dataset in a well-characterized sample of 488 children (nADHD = 296) to test Research Domain Criteria initiative-inspired hypotheses about transdiagnostic risk. Network features included Diagnostic and Statistical Manual of Mental Disorders symptoms, trait-based ratings of emotional functioning (temperament), and performance-based measures of cognition. Results confirmed that ADHD symptom domains, temperamental irritability, and working memory are independent transdiagnostic risk factors for psychopathology based on their direct associations with other features across time. ADHD symptoms and working memory each had direct, independent associations with depression. Results also demonstrated tightly linked co-development of ADHD symptoms and temperamental irritability, consistent with the possibility that this type of anger dysregulation is a core feature that is co-expressed as part of the ADHD phenotype for some children. En ligne : http://dx.doi.org/10.1017/S0954579421000900 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=458 [article] Longitudinal network model of the co-development of temperament, executive functioning, and psychopathology symptoms in youth with and without ADHD [Texte imprimé et/ou numérique] / Sarah L. KARALUNAS, Auteur ; Dylan ANTOVICH, Auteur ; Patrick K. GOH, Auteur ; Michelle M. MARTEL, Auteur ; Jessica TIPSORD, Auteur ; Elizabeth K. NOUSEN, Auteur ; Joel T. NIGG, Auteur . - p.1803-1820. Langues : Anglais (eng) in Development and Psychopathology > 33-5 (December 2021) . - p.1803-1820 Mots-clés : ADHD  executive functioning  longitudinal network  RDoC  temperament  transdiagnostic risk Index. décimale : PER Périodiques Résumé : Attention-deficit hyperactivity disorder (ADHD) is a common, chronic, and impairing disorder, yet presentations of ADHD and clinical course are highly heterogeneous. Despite substantial research efforts, both (a) the secondary co-occurrence of ADHD and complicating additional clinical problems and (b) the developmental pathways leading toward or away from recovery through adolescence remain poorly understood. Resolving these requires accounting for transactional influences of a large number of features across development. Here, we applied a longitudinal cross-lagged panel network model to a multimodal, multilevel dataset in a well-characterized sample of 488 children (nADHD = 296) to test Research Domain Criteria initiative-inspired hypotheses about transdiagnostic risk. Network features included Diagnostic and Statistical Manual of Mental Disorders symptoms, trait-based ratings of emotional functioning (temperament), and performance-based measures of cognition. Results confirmed that ADHD symptom domains, temperamental irritability, and working memory are independent transdiagnostic risk factors for psychopathology based on their direct associations with other features across time. ADHD symptoms and working memory each had direct, independent associations with depression. Results also demonstrated tightly linked co-development of ADHD symptoms and temperamental irritability, consistent with the possibility that this type of anger dysregulation is a core feature that is co-expressed as part of the ADHD phenotype for some children. En ligne : http://dx.doi.org/10.1017/S0954579421000900 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=458

Prospective prediction of developing internalizing disorders in ADHD / Sarah L. KARALUNAS in Journal of Child Psychology and Psychiatry, 64-5 (May 2023)  

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Transactional relations between caregiving stress, executive functioning, and problem behavior from early childhood to early adolescence / Linda L. LAGASSE in Development and Psychopathology, 28-3 (August 2016)  

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