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Behavioral and executive functions in children with Attention-Deficit Hyperactivity disorder and reading disability

J.M. Halperin

S.T. Schwartz

J.H. Newcorn

Attention, impulse control, activity level, and motor decision/response organization were assessed in 70 child psychiatric outpatients, using a continuous performance test (CPT), a solid-state actigraph, and a response incompatibility task. Subjects were divided based on the presence or absence of attention-deficit hyperactivity disorder (ADHD) and/or reading disability (RD). Two-way ANOVAs yielded significant main effects for ADHD, but not RD, on objective measures of impulsivity and overactivity. No significant differences were found on a CPT measure of inattention. The response incompatibility task revealed differential performance between ADHD subgroups with and without comorbid RD. Deficits in motor decision/response organization were observed in the ADHD-only subgroup, but not in the comorbid ADHD+RD subgroup. These findings suggest that children with ADHD, RD and comorbid ADHD+RD have at least partially distinct underlying cognitive and neuropsychological disturbances, and that executive function deficits may be present primarily in ADHD children without RD.

Journal of Attention Disorders, Vol. 1, No. 4, 235-243 (1997)
DOI: 10.1177/108705479700100404


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