One-trial context fear conditioning as a function of the interstimulus interval

Rick A Bevins, John J B Ayres

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

In two experiments, we examined the effects of a wide range of interstimulus intervals (2.5, 15, 45, 120, 135, and 405 sec) on one-trial context fear conditioning with rats. Here, the interstimulus interval (ISI) denotes the time between placement in a conditioning chamber and the onset of a single footshock. On the conditioning day, we observed that the rats' behavior at the time of shock onset varied systematically across ISI values. On the subsequent test day, we used context-evoked freezing as a measure of context conditioning and found the well-known inverted U-shaped ISI function. We also found that conditioned freezing for the shortest ISI values was concentrated early in the test session, whereas freezing at longer ISIs was distributed more evenly throughout the test session. The freezing results found here are more consistent with the literature on conditioning with punctate cues than are previously described results from one-trial context fear-conditioning procedures.

Original languageEnglish (US)
Pages (from-to)400-410
Number of pages11
JournalAnimal Learning & Behavior
Volume23
Issue number4
DOIs
StatePublished - Dec 1 1995

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conditioned behavior
fearfulness
Fear
Freezing
freezing
rats
testing
Cues
Conditioning (Psychology)
Shock

ASJC Scopus subject areas

  • Neuropsychology and Physiological Psychology
  • Experimental and Cognitive Psychology
  • Psychology(all)
  • Behavioral Neuroscience
  • Animal Science and Zoology

Cite this

One-trial context fear conditioning as a function of the interstimulus interval. / Bevins, Rick A; Ayres, John J B.

In: Animal Learning & Behavior, Vol. 23, No. 4, 01.12.1995, p. 400-410.

Research output: Contribution to journalArticle

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