Abstract
70 college Ss acquired an avoidance response with omission of recording constituting the aversive stimulus. 60 Ss received a punished extinction procedure in which omission of recording occurred either 0, 3, or 6 sec. after a response. Duration of recording omission in each delay group was either 5 or 15 sec. Ten Ss received a normal CS-only extinction procedure. Results indicated that resistance to extinction was directly related to the delay intervals. Duration did not differentially affect performance during extinction. Greatest resistance to extinction occurred in the CS-only group.
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