A brain event related to the making of a sensory discrimination.
Event-related potentials associated with detected targets in a vigilance task were analyzed in two ways: (i) by sorting the potentials in terms of sequential reaction time bins of 50 milliseconds and (ii) by examining the single trial waveforms. A negative component (N2) covaried in latency with reaction time. These results support the hypothesis that N2 reflects a decision process which controls behavioral responses in sensory discrimination tasks.
D001519:Behavior / Q000502:physiology; D001921:Brain / Q000502:physiology*; D003071:Cognition / Q000502:physiology; D004192:Discrimination, Psychological / Q000502:physiology*; D005071:Evoked Potentials; D006801:Humans; D010897:Pitch Discrimination / Q000502:physiology; D013997:Time Factors