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The Hierarchical Factor Model of ADHD: Invariant across Age and National Groupings?
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Toplak, Maggie E.; Sorge, Geoff B.; Flora, David B.; Chen, Wai; Banaschewski, Tobias; Buitelaar, Jan; Ebstein, Richard; Eisenberg, Jacques; Franke, Barbara; Gill, Michael; Miranda, Ana; Oades, Robert D.; Roeyers, Herbert; Rothenberger, Aribert; Sergeant, Joseph; Sonuga-Barke, Edmund; Steinhausen, Hans-Christoph; Thompson, Margaret; Tannock, Rosemary; Asherson, Philip; Faraone, Stephen V. – Journal of Child Psychology and Psychiatry, 2012
Objective: To examine the factor structure of attention-deficit/hyperactivity disorder (ADHD) in a clinical sample of 1,373 children and adolescents with ADHD and their 1,772 unselected siblings recruited from different countries across a large age range. Hierarchical and correlated factor analytic models were compared separately in the ADHD and…
Descriptors: Attention Deficit Hyperactivity Disorder, Siblings, Factor Structure, Adolescents
Caregiver Burden as People with Autism Spectrum Disorder and Attention-Deficit/Hyperactivity Disorder Transition into Adolescence and Adulthood in the United Kingdom
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Cadman, Tim; Eklund, Hanna; Howley, Deirdre; Hayward, Hannah; Clarke, Hanna; Findon, James; Xenitidis, Kiriakos; Murphy, Declan; Asherson, Philip; Glaser, Karen – Journal of the American Academy of Child & Adolescent Psychiatry, 2012
Objective: There is increasing recognition that autism spectrum disorder (ASD) and attention-deficit/hyperactivity disorder (ADHD) are associated with significant costs and burdens. However, research on their impact has focused mostly on the caregivers of young children; few studies have examined caregiver burden as children transition into…
Descriptors: Caring, Attention Deficit Hyperactivity Disorder, Autism, Family Characteristics
A Longitudinal Twin Study on the Association between Inattentive and Hyperactive-Impulsive ADHD Symptoms
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Greven, Corina U.; Asherson, Philip; Rijsdijk, Fruhling V.; Plomin, Robert – Journal of Abnormal Child Psychology, 2011
DSM-IV distinguishes two symptom domains of attention deficit hyperactivity disorder (ADHD): inattentiveness and hyperactivity-impulsivity. The present study examines the aetiologies and developmental relations underlying the associations between inattentiveness and hyperactivity-impulsivity over time, based on a representative population sample…
Descriptors: Attention Deficit Hyperactivity Disorder, Conceptual Tempo, Twins, Early Adolescents
A Longitudinal Twin Study on the Association between ADHD Symptoms and Reading
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Greven, Corina U.; Rijsdijk, Fruhling V.; Asherson, Philip; Plomin, Robert – Journal of Child Psychology and Psychiatry, 2012
Background: Attention deficit hyperactivity disorder (ADHD) and reading disability commonly co-occur because of shared genetic risk factors. However, the stability and change of these genetic influences and the predictive relationships underlying this association longitudinally remain unclear. Methods: ADHD symptoms and reading were assessed as…
Descriptors: Attention Deficit Hyperactivity Disorder, Twins, Early Adolescents, Risk
Evidence for Overlapping Genetic Influences on Autistic and ADHD Behaviours in a Community Twin Sample
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Ronald, Angelica; Simonoff, Emily; Kuntsi, Jonna; Asherson, Philip; Plomin, Robert – Journal of Child Psychology and Psychiatry, 2008
Background: High levels of clinical comorbidity have been reported between autistic spectrum disorders (ASD) and attention deficit hyperactivity disorder (ADHD). This study takes an individual differences approach to determine the degree of phenotypic and aetiological overlap between autistic traits and ADHD behaviours in the general population.…
Descriptors: Twins, Autism, Asperger Syndrome, Psychologists