Event-related potentials were recorded (N = 18) in a hybrid go/no-go Eriksen flanker task to study the neural correlates of response inhibition. Three letters were assigned to either a left-hand, a right-hand, or a no-go response. These three letters appeared either as targets signaling the assigned response or as flankers surrounding the target. The lateralized readiness potentials revealed erroneous cortical response priming on go trials, in which the target and flankers were assigned to different hands, as well as on no-go trials, in which the flankers primed one of the two hands. Exactly these two conditions were accompanied by a fronto-central amplitude modulation of the N200, suggesting that this ERP component may reflect inhibitory executive functions. The data replicate and extend recent studies by Kopp, Rist, and Mattler (1996) and Kopp, Mattler, Goertz, and Rist (1996) .
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