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Evidence for Shared Genetic Risk between ADHD Symptoms and Reduced Mathematics Ability: A Twin Study
Peer reviewed
Direct linkGreven, Corina U.; Kovas, Yulia; Willcutt, Erik G.; Petrill, Stephen A.; Plomin, Robert – Journal of Child Psychology and Psychiatry, 2013
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…
Descriptors: Attention Deficit Hyperactivity Disorder, Symptoms (Individual Disorders), Genetic Disorders, Environmental Influences
Coude, Francois X.; Mignot, Claire; Lyonnet, Stanislas; Munnich, Arnold – Journal of Attention Disorders, 2007
Objective: The authors analyze the occurrence of grade repetition and inattention in children diagnosed with neurofibromatosis type 1 (NF1). Method: The participant group consisted of 310 patients with NF1 and a control group of 242 individuals. The number of grade repetitions for each participant during his or her time in elementary, middle, and…
Descriptors: Control Groups, Grade Repetition, Patients, Attention Deficit Disorders
