S. Koyama et al., ERPS IN SCHIZOPHRENIC-PATIENTS DURING WORD RECOGNITION TASK AND REACTION-TIMES, Electroencephalography and clinical neurophysiology, 92(6), 1994, pp. 546-554
Event-related brain potentials (ERPs) were recorded in 28 schizophreni
c patients and 26 healthy controls during a word recognition task. In
each trial, stimuli consisting of S1 (word) and S2 (word or non-word)
were presented. The subjects were required to indicate whether S2 was
a word or a non-word by pressing buttons. For both groups, a clear N37
0 was elicited by S2 which were non-word or semantically unrelated to
its S1. The N370 amplitude did not differ between the groups. The schi
zophrenics responded more slowly than the controls, and the latencies
of P200 and N370 were longer for patients than for controls. However,
these latencies did not differ between the groups when their reaction
times were matched.