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Differential assessment of attention and impulsivity in children.

Abstract A sample of 72 unselected school children was administered the continuous performance test. Of the four types of commission errors that were identified, two occurred at significantly different reaction times than correct responses. One was characterized by fast reaction times and appears to reflect impulsive or rapid responding, while the other occurred at slow reaction times and appears to be caused by inattention. Correlations with teacher ratings of behavior further support the notion that different types of commission errors assess different underlying psychological functions.