Abstract
ess were presented to rats licking sucrose after one of several off-the-baseline Pavlovian defense conditioning procedures. Two random procedures in which there was no cs-us contingency were constructed by programming ess and uss on independent random schedules which had either a long or a short variable inter-cs interval (vrn). Because the cs took up more of the session in the short vrn procedure, it contained more cs-us pairings and produced cs-elicited suppression of ticking. Suppression occurred with neither the long vrn group nor with shock alone controls. Conditioning was all-or-none after both classical and random procedures. ACCORDING TO THE CONTINGENCY THEORY of classical conditioning, excit
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More From: Canadian Journal of Psychology / Revue canadienne de psychologie
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