Fig. (1) Proportion of ADHD patients with Altered Neuropsychological Tests. Considering that the presence of a 1SD away from the average value of the healthy population in any of the test to evaluate the Executive Function (EF) of ADHD patients, we found that a most patients showed no alteration in the different neuropsychological tests. These data suggest that not all children with ADHD suffer from neuropsychological dysfunction. Note : WISC= Wechsler Intelligence Scale (IQ: intelligence quotient, T-IQ : Total IQ, V-IQ: Verbal IQ, M-IQ: Manipulative IQ, VC: Verbal Comprehension, PR: Perceptual Reasoning, WM: Working Memory, PS: Perceptual Reasoning) CPT-II: Conners’ Continuous Performance Test II (CE: Commission Errors, OE: Omission Errors, Hit RT: Reaction Time,). STROOP: Stroop COLOR WORD Test (I= interference).