Abstract
Attention-deficit hyperactivity disorder (ADHD) is one of the most prevalent disorder during childhood. The present study aimed to evaluate if the Conners Continous Performance Test was able to discriminate among ADHD and normal children completed the Conners computarized test. Significant differences between normal and clinical sample were found. All children selected as normal did not fit the clinical profile. Only 50% of the children considered as having ADHD fit the clinical profile. Implications for the issue of overdiagnosis of the disorder are discussed.