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Direct linkHartman, Christie A.; Rhee, Soo H.; Willcutt, Erik G.; Pennington, Bruce F – Journal of Abnormal Child Psychology, 2007
The present study is the first to utilize twin modeling to examine whether parent-teacher disagreement for ADHD ratings is due to parent or teacher bias, or due to raters observing different but valid ADHD behaviors. A joint analysis was conducted with 106 twin pairs, including twins selected for ADHD and control twin pairs. Total ADHD scores were…
Descriptors: Twins, Attention Deficit Disorders, Hyperactivity, Scores
Losh, Molly; Piven, Joseph – Journal of Child Psychology and Psychiatry, 2007
Background: Strong evidence from twin and family studies suggests that the genetic liability to autism may be expressed through personality and language characteristics qualitatively similar, but more subtly expressed than those defining the full syndrome. This study examined behavioral features of this "broad autism phenotype" (BAP) in relation…
Descriptors: Social Cognition, Autism, Social Characteristics, Personality
Oliver, Bonamy; Dale, Philip S.; Plomin, Robert – Journal of Child Language, 2004
We investigated infant precursors of low language scores in early childhood. The sample included 373 probands in 130 monozygotic (MZ) and 109 same-sex dizygotic (DZ) twin pairs in which at least one member of the pair scored in the lowest 15th percentile of a control sample on a general language factor derived from tester-administered tests at…
Descriptors: Twins, Young Children, Genetics, Cognitive Development
