title: Effects of a pre-aversive stimulus upon oddity performance in monkeys.
abstract: Two monkeys (Macaca mulatta) were trained to perform an oddity discrimination using automatically projected patterned stimuli. After criteria for both response and discrimination stability were met, a tone followed by shock was superimposed upon the ongoing behavior. Each 60-sec tone was terminated with the onset of a 0.3-sec, 1 to 1.5-ma electric shock. During the tone, baseline responding was partially suppressed but discrimination performance was little altered from the pre-tone period. When shock was raised to 2 to 3 ma, responding was further suppressed, but discrimination performance was again essentially unaltered.
mesh_terms: D000818:Animals; D003216:Conditioning, Operant; D004192:Discrimination, Psychological; D004597:Electroshock; D000882:Haplorhini; D011930:Reaction Time; D013016:Sound; D014796:Visual Perception