Abnormal spatial asymmetry of selective attention in ADHD / Edgar CHAN in Journal of Child Psychology and Psychiatry, 50-9 (September 2009)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 50-9 (September 2009) . - p.1064-1072 Titre : Abnormal spatial asymmetry of selective attention in ADHD Type de document : Texte imprimé et/ou numérique Auteurs : Edgar CHAN, Auteur ; Cynthia L. HUANG-POLLOCK, Auteur ; Mark A. BELLGROVE, Auteur ; Jason B. MATTINGLEY, Auteur ; Therese ENGLISH, Auteur ; Robert HESTER, Auteur ; Alasdair VANCE, Auteur Année de publication : 2009 Article en page(s) : p.1064-1072 Langues : Anglais (eng) Mots-clés : Selective-attention flanker-interference spatial-bias ADHD spatial-attention Index. décimale : PER Périodiques Résumé : Background: Evidence for a selective attention abnormality in children with attention deficit hyperactivity disorder (ADHD) has been hard to identify using conventional methods from cognitive science. This study tested whether the presence of selective attention abnormalities in ADHD may vary as a function of perceptual load and target lateralisation. Given evidence of right-hemisphere dysfunction in ADHD we predicted increased interference effects for right, but not left-sided target displays, particularly under low perceptual load. Method: Fourteen children with ADHD-C and 14 typically developing children were tested on a modified flanker task under low and high perceptual load. We also sought evidence for our hypothesis in a re-analysis of an independent data set (42 ADHD; 34 typically developing) in which load effects on selective attention in ADHD were previously examined (Huang-Pollock, Nigg, & Carr, 2005). Results: As predicted, all children showed evidence of greater interference by flankers under low compared with high perceptual load conditions. Crucially, however, children with ADHD showed the greatest interference effect for right-sided target displays under low but not high perceptual load. In contrast, typically developing children showed the greatest interference for left-sided target displays. The magnitude of interference for right-sided targets was also positively correlated with ADHD symptom levels. Re-analysis of an independent data set (Huang-Pollock et al., 2005) further confirmed our findings. Conclusions: This study demonstrates that interference effects in children with ADHD and typically developing children are spatially asymmetrical but opposite in direction. The pattern of right-sided interference effects in children with ADHD suggests disruption within right hemisphere attentional networks in ADHD. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2009.02096.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=828 [article] Abnormal spatial asymmetry of selective attention in ADHD [Texte imprimé et/ou numérique] / Edgar CHAN, Auteur ; Cynthia L. HUANG-POLLOCK, Auteur ; Mark A. BELLGROVE, Auteur ; Jason B. MATTINGLEY, Auteur ; Therese ENGLISH, Auteur ; Robert HESTER, Auteur ; Alasdair VANCE, Auteur . - 2009 . - p.1064-1072. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 50-9 (September 2009) . - p.1064-1072 Mots-clés : Selective-attention flanker-interference spatial-bias ADHD spatial-attention Index. décimale : PER Périodiques Résumé : Background: Evidence for a selective attention abnormality in children with attention deficit hyperactivity disorder (ADHD) has been hard to identify using conventional methods from cognitive science. This study tested whether the presence of selective attention abnormalities in ADHD may vary as a function of perceptual load and target lateralisation. Given evidence of right-hemisphere dysfunction in ADHD we predicted increased interference effects for right, but not left-sided target displays, particularly under low perceptual load. Method: Fourteen children with ADHD-C and 14 typically developing children were tested on a modified flanker task under low and high perceptual load. We also sought evidence for our hypothesis in a re-analysis of an independent data set (42 ADHD; 34 typically developing) in which load effects on selective attention in ADHD were previously examined (Huang-Pollock, Nigg, & Carr, 2005). Results: As predicted, all children showed evidence of greater interference by flankers under low compared with high perceptual load conditions. Crucially, however, children with ADHD showed the greatest interference effect for right-sided target displays under low but not high perceptual load. In contrast, typically developing children showed the greatest interference for left-sided target displays. The magnitude of interference for right-sided targets was also positively correlated with ADHD symptom levels. Re-analysis of an independent data set (Huang-Pollock et al., 2005) further confirmed our findings. Conclusions: This study demonstrates that interference effects in children with ADHD and typically developing children are spatially asymmetrical but opposite in direction. The pattern of right-sided interference effects in children with ADHD suggests disruption within right hemisphere attentional networks in ADHD. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2009.02096.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=828

ADHD Subtype Differences in Motivational Responsivity but not Inhibitory Control: Evidence From a Reward-Based Variation of the Stop Signal Paradigm / Cynthia L. HUANG-POLLOCK in Journal of Clinical Child & Adolescent Psychology, 36-2 (April-June 2007)  

Public ISBD [article]  inJournal of Clinical Child & Adolescent Psychology > 36-2 (April-June 2007) . - p.127-136 Titre : ADHD Subtype Differences in Motivational Responsivity but not Inhibitory Control: Evidence From a Reward-Based Variation of the Stop Signal Paradigm Type de document : Texte imprimé et/ou numérique Auteurs : Cynthia L. HUANG-POLLOCK, Auteur ; Amori Yee MIKAMI, Auteur ; Linda PFIFFNER, Auteur ; Keith MCBURNETT, Auteur Année de publication : 2007 Article en page(s) : p.127-136 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : In this study we examined prepotent motor inhibition and responsiveness to reward using a variation of the stop signal reaction time (SSRT) task in clinic- and community-recruited children ages 7 to 12 with attention-deficit/hyperactivity disorder—inattentive type (ADHD—I), ADHD—combined type (ADHD—C), and non-ADHD controls. Contrary to theoretical expectations, we found evidence for inhibitory weaknesses in ADHD—I. We also found evidence that although children with ADHD—I were able to improve their inhibitory control given reward-based motivation, the improvement depended on the order of reward conditions. Results suggest that the 2 primary subtypes of ADHD share similar neuropsychological weaknesses in inhibitory control but that there are subtype differences in response to success and failure that contribute to a child's ultimate level of performance. En ligne : http://dx.doi.org/10.1080/15374410701274124 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=144 [article] ADHD Subtype Differences in Motivational Responsivity but not Inhibitory Control: Evidence From a Reward-Based Variation of the Stop Signal Paradigm [Texte imprimé et/ou numérique] / Cynthia L. HUANG-POLLOCK, Auteur ; Amori Yee MIKAMI, Auteur ; Linda PFIFFNER, Auteur ; Keith MCBURNETT, Auteur . - 2007 . - p.127-136. Langues : Anglais (eng) in Journal of Clinical Child & Adolescent Psychology > 36-2 (April-June 2007) . - p.127-136 Index. décimale : PER Périodiques Résumé : In this study we examined prepotent motor inhibition and responsiveness to reward using a variation of the stop signal reaction time (SSRT) task in clinic- and community-recruited children ages 7 to 12 with attention-deficit/hyperactivity disorder—inattentive type (ADHD—I), ADHD—combined type (ADHD—C), and non-ADHD controls. Contrary to theoretical expectations, we found evidence for inhibitory weaknesses in ADHD—I. We also found evidence that although children with ADHD—I were able to improve their inhibitory control given reward-based motivation, the improvement depended on the order of reward conditions. Results suggest that the 2 primary subtypes of ADHD share similar neuropsychological weaknesses in inhibitory control but that there are subtype differences in response to success and failure that contribute to a child's ultimate level of performance. En ligne : http://dx.doi.org/10.1080/15374410701274124 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=144

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

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