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Raiker, Joseph S.; Rapport, Mark D.; Kofler, Michael J.; Sarver, Dustin E. – Journal of Abnormal Child Psychology, 2012
Impulsivity is a hallmark of two of the three DSM-IV ADHD subtypes and is associated with myriad adverse outcomes. Limited research, however, is available concerning the mechanisms and processes that contribute to impulsive responding by children with ADHD. The current study tested predictions from two competing models of ADHD--working memory (WM)…
Descriptors: Attention Deficit Hyperactivity Disorder, Conceptual Tempo, Reaction Time, Performance Tests
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Hodge, Steven M.; Makris, Nikos; Kennedy, David N.; Caviness, Verne S., Jr.; Howard, James; McGrath, Lauren; Steele, Shelly; Frazier, Jean A.; Tager-Flusberg, Helen; Harris, Gordon J. – Journal of Autism and Developmental Disorders, 2010
We performed cerebellum segmentation and parcellation on magnetic resonance images from right-handed boys, aged 6-13 years, including 22 boys with autism [16 with language impairment (ALI)], 9 boys with Specific Language Impairment (SLI), and 11 normal controls. Language-impaired groups had reversed asymmetry relative to unimpaired groups in…
Descriptors: Autism, Language Impairments, Performance Tests, Short Term Memory
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Iselin, Anne-Marie R.; DeCoster, Jamie – Cognitive Development, 2009
This study compared the cognitive control skills of male incarcerated adolescents (n = 44), male control adolescents (n = 33), male incarcerated young adults (n = 41), and male control young adults (n = 35) using the AX-continuous performance test (AX-CPT). This test measures proactive control (the ability to maintain a mental representation of…
Descriptors: Self Control, Performance Tests, Hyperactivity, Young Adults
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Mayes, Susan Dickerson; Calhoun, Susan L. – Journal of Attention Disorders, 2006
Wechsler Intelligence Scale for Children, 3rd and 4th editions (WISC-III n = 586 and WISC-IV n = 118), profiles were compared for children with ADHD and normal intelligence. Mean Verbal Comprehension Index (VCI) and Perceptual Organization/Perceptual Reasoning Index (POI/PRI) scores were significantly higher than Freedom From…
Descriptors: Comparative Analysis, Cognitive Processes, Intelligence Tests, Attention Deficit Disorders