Mother-assessed hyperactivity and conduct disturbances were derived from the Strengths and Difficulties Questionnaire (SDQ), a widely used screening instrument that has been validated for use in the community (Goodman, 1997; Goodman et al, 2003). Two of the five SDQ factors assess hyperactive and antisocial behavior. Each factor has five questions concerning behavior over the last six months. The hyperactivity domains are: restless / overactive; constantly fidgeting; easily distracted; not thinking before acting; poor attention span. The conduct domains are: frequent temper tantrums; disobedience; fighting / bullying; telling lies / cheating; stealing.
