Conditioned inhibition of autonomic Pavlovian conditioning in humans.
The present study aimed to demonstrate conditioned inhibition of Pavlovian conditioning of autonomic responses in humans. Subjects (N = 21) were presented initially with four geometric shapes (A, B, C and D). An electric shock served as the unconditioned stimulus (US) during acquisition. Conditional stimuli lasted for 8 s and US onset coincided with CS offset. Subjects were trained with A-US, C-US, and AC-US pairings and AB alone and B alone presentations. The subsequent summation test consisted of C-US pairings and CB alone and CD alone presentations. Conditioning was evident in self-reported US expectancy and first and second interval electrodermal responses. Evidence for conditioned inhibition during the summation test was found in US expectancy and second interval electrodermal responses.
Neumann
D L
DL
Department of Psychology, University of Queensland, Australia.
Lipp
O V
OV
Siddle
D A
DA
D000293:Adolescent; D000328:Adult; D001341:Autonomic Nervous System; D003214:Conditioning, Classical; D004558:Electric Stimulation; D005260:Female; D005712:Galvanic Skin Response; D006801:Humans; D007266:Inhibition, Psychological; D008297:Male