| Abstract: | Modified signal detection procedures were used to analyze the effects of inferotemporal cortical resections in 2 experiments with a total of 14 adolescent rhesus monkeys. Results demonstrate (a) a severe difficulty in responding to differences in luminance; (b) a small but consistent change in sensitivity, which is attributed to an increased sensitivity to noise or a deficiency in the suppression of irrelevant aspects of the environment; and (c) an enhanced bias to respond to a nonrewarded stimulus (a lowering of criterion). This altered bias contrasts with the results obtained from limbic resections in a previous experiment, which produced a marked increase in bias to a rewarded contingency without influencing discrimination or detection. (43 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
