Abstract
Two experiments are reported in which distress vocalizations to shock (UR) were studied while varying signaled (CS) and unsignaled shock (US), strains, and seven different CS-US intervals (ISI) from 100 msec to 6 sec. Measures analyzed were total vocalizations, vocalizations on Trial 1, and distribution of vocalizations over the 2 sec shock. ISIs of 300 msec or less did not suppress vocalizations while ISIs from.5 to 6 sec did (p <.001), but not differentially. CS suppression of the UR occurred on Trial 1 (p <.001) and continued for all trials. Albinos vocalized more than hoods (p <.01). A non-associative interpretation was supported.
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Badia, P., Defran, R.H. & Lewis, P. CS-US interval and suppression of unconditioned vocalization to shock: Associative or non-associative. Psychon Sci 13, 269–270 (1968). https://doi.org/10.3758/BF03342518
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DOI: https://doi.org/10.3758/BF03342518