Abstract
The present study was aimed to examine the effect of the evaluation for UCS aversiveness on CRs of the fear conditioning. Eighteen graduate and undergraduate volunteers served as subjects. They were assigned into three experimental groups; UCS Inflation, UCS Deflation and Control. Indices of CRs were SCR, subjective anxiety and affective evaluation. The experiment was consisted of five sessions; pre-test, conditioning, operations of UCS intensity, test and extinction. The main results were as follows; (1) In test session, CR strength such as SCR and subjective anxiety in Inflation group were greater than those of other groups. (2) There was no difference of CR strength between Deflation and Control group in test session. (3) After extinction session, affective evaluation, one of indices of CRs, did not extinct in all groups. These results suggested that increase of UCS aversive evaluation would effect on the strength of SCR and the degree of subjective anxiety.
