Attention deficit disorder with hyperactivity (ADHD) is a common comorbidity in children with Tourette syndrome (TS). However, motor restlessness and high levels of sensorimotor activation or “overactivity” may be a feature of TS rather than a distinct ADHD comorbidity. The link between overactivity and ADHD in TS has yet to be established and in particular between adult and preadolescent manifestations. The current study furthers this understanding of ADHD features in TS by investigating the relationship between cognitive and behavioral aspects of ADHD and TS. The style of planning (STOP) overactivity scale was compared in preadolescent ( ) and adult ( ) samples. The STOP overactivity scale measures the characteristic overactive style of planning in everyday life. The aims of the study were twofold as follows: (1) to see if an overactive style was present in adolescents as well as in adults, and (2) to see if this overactive style correlated with hyperactivity, impulsivity, or perfectionism. Results suggest that overactivity may be a better description of the hyperactivity manifestations in TS. Behavioral components of overactivity were present in preadolescents while the cognitive components were more frequent in adults. Overactivity relates at the same time to perfectionism and impulsivity. 1. Introduction Tourette syndrome (TS) is a tic disorder characterized by the presence of at least one phonic tic and several motor tics for 3 consecutive months (American Psychiatric Association [1]. A tic is defined as an involuntary, sudden, repetitive and stereotyped movement or vocalization. TS has to be diagnosed before the age of 18 and is more frequent in males than in females (1.5？:？1 to 3？:？1) [2–6] TS is present in 5 to 30 children and in 1 to 2 adults on 10？000 [1]. Over the last decade, many epidemiological studies have tried to establish a more representative prevalence rate of TS [7–11], and the prevalence rate of TS is estimated now to be one individual in 200 [12]. Rates of comorbidity vary across studies and estimates between 50% and 90% of children with TS have sufficient behavioral and emotional symptoms to meet diagnostic criteria for a comorbid disorder [13, 14]. In most cases, the externalized manifestations of these comorbid disorders may be more disruptive than the tics per se and can often be the main motivator for seeking help [12]. The disorders most frequently associated with TS are attention deficit disorder with hyperactivity (ADHD), obsessive-compulsive disorder (OCD), anxiety and mood disorders, behavioral disorders, and learning
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