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PSYCHOPHYSIOLOGIC ASPECTS OF PAROTID SALIVATION IN MAN: II. EFFECTS OF VARYING INTERSTIMULUS INTERVALS ON DELAYED SALIVARY CONDITIONING
Author(s) -
Brown Clinton C.,
Katz Ruth A.
Publication year - 1967
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.1967.tb02743.x
Subject(s) - interstimulus interval , psychology , conditioning , audiology , developmental psychology , reinforcement , conditioned response , classical conditioning , social psychology , neuroscience , statistics , medicine , mathematics , stimulation
The aim of this study was to determine the effect of varying the interval between the onsets of CS and US on human salivary conditioning. Three interstimulus intervals (ISI's) were employed–5 sec, 3 sec, and 0.25 sec with an auditory CS of 5 sec duration and 1 ml (bilaterally) of flavored acid as US. Eighteen subjects were equally divided into the three ISI groups. Both positive (600cps) and negative (200cps) tones were given and a 50% reinforcement schedule was followed in the last quarter of the test. The duration of the salivary unconditional response was significantly increased for the shortest (0.25 sec) ISI group for the total test period. In the last quarter of the test, the shortest ISI group showed significantly increased frequency of response to unreinforced CS presentations. The authors suggest that the change in shape of the UR was a function of the conditioning process and the increased responding to unreinforced CS's by the briefest ISI group demonstrated the importance of the temporal spacing within the conditioning paradigm.