Sample Characteristics.

ADHD, ADHD group; CON, control group; R−, no financial reward; R+, financial reward. Diagnosis, main effect of diagnostic group; Reward, main effect of reward condition; Diagnosis × Reward, interaction effect of diagnostic group and reward condition. n, number of subjects; M, median; SD, standard deviation; F, F-values. CAARS-S:L subscales (PR): IN, DSM-IV Inattentive Symptoms; HI, DSM-IV Hyperactive-Impulsive Symptoms; TOT, DSM-IV Total ADHD Symptoms. ADHS-SB subscales: IN, number of fulfilled criteria for inattention (DSM-IV); HI, number of fulfilled criteria for hyperactivity/impulsivity (DSM-IV). *p<0.05; **p<0.01; ***p<0.001.