Hovik, Kjell Tore3; Plessen, Kerstin J1; Skogli, Erik Winther3; Andersen, Per Normann3; Oie, Merete3
1 Børne- & Ungdomspsykiatrisk Center Bispebjerg, Børne- og Ungdomspsykiatrisk Center, Region Hovedstaden, Mental Health Services, The Capital Region of Denmark2 Børne- og Ungdomspsykiatrisk Center, Region Hovedstaden, Mental Health Services, The Capital Region of Denmark3 unknown
Objective: This study investigates whether performance in a verbal response task (Color-Word Interference Test [CWIT]) and a motor response task (Conners' Continuous Performance Test [CCPT]) discriminates children with Tourette's Syndrome (TS), ADHD, and typically developing children (TDC). Method: Nineteen children with TS, 79 with ADHD, and 50 with TDC participated (8-17 years). Results: Children with TS committed significantly fewer errors in the verbal response task than those with ADHD. Moreover, children with TS but without ADHD performed better than TDC. Errors in motor task and speed of response did not distinguish between groups. A cautious tendency of response correlated positively with rates of tics in children with TS. Conclusion: Children with TS were superior in inhibiting a prepotent verbal response; however, comorbidity with ADHD in those children negatively influenced performance. Results support the hypothesis that levels of inhibitory control distinguish children with TS, ADHD, and TDC. (J. of Att. Dis. XXXX; XX(X) XX-XX).