Social functioning in predominantly inattentive and combined subtypes of children with ADHD.

Objective: The objective of this study was to compare the social functioning of children with the Combined (CB) and Predominantly Inattentive (PI) subtypes of Attention Deficit/Hyperactivity Disorder (ADHD), controlling for comorbidity and medication-status, which may have confounded the results of previous research.

Method: Parents and teachers of rigorously diagnosed unmedicated children with PI or CB subtypes of ADHD, and typical comparison children, rated them on the multidimensional Social Skills Rating Scale (SSRS).

Results: After co-varying for oppositionality and anxiety, social impairment was substantial and equivalent in both ADHD groups whether rated by parent or teacher.

Neurocognitive functioning in AD/HD, predominantly inattentive and combined subtypes.

The Predominantly Inattentive (PI) and Combined (CB) subtypes of AD/HD differ in cognitive tempo, age of onset, gender ratio, and comorbidity, yet a differentiating endophenotype has not been identified. The aim of this study was to test rigorously diagnosed PI, CB, and typical children on measures selected for their potential to reveal hypothesized differences between the subtypes in specific neurocognitive systems (anterior vs. posterior attentional systems) and processes (arousal vs.