CAPD may appear very similar to ADHD, but CAPD is distinguished from ADHD by noting difficulty only in performance on listening tasks. This CAPD difficulty is not seen in visual, tactile, recreational, or “independent work time” tasks. Difficulties in these areas are indicative of ADHD.
ADHD symptoms, according to the DSM-IV (the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition) include: "often fails to give close attention to details or makes careless mistakes; often has difficulty sustaining attention to tasks; often does not seem to listen when spoken to directly; often fails to follow instructions carefully and completely; losing or forgetting important things; feeling restless, often fidgeting with hands or feet, or squirming; running or climbing excessively; often talks excessively; often blurts out answers before hearing the whole question; often has difficulty awaiting turn. Please keep in mind that the exact nature and severity of ADHD symptoms varies from person to person. Approximately one-third of people with ADHD do not have the hyperactive or overactive behavior component.