Scalar Timing Varies With Response Magnitude in Classical Conditioning of the Nictitating Membrane Response of the Rabbit (Oryctolagus cuniculus)

E. James Kehoe*, Kirk N. Olsen, Elliot A. Ludvig, Richard S. Sutton

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The present experiment was aimed at characterizing the timing of conditioned nictitating membrane (NM) movements as function of the interstimulus interval (ISI) in delay conditioning for rabbits (Oryctolagus cuniculus). Onset latency and peak latency were approximately, but not strictly, scalar for all but the smallest movements (<.10 mm). That is, both the mean and standard deviation of the timing measures increased in proportion to the ISI, but their coefficients of variation (standard deviation/mean) tended to be larger for shorter ISIs. For all ISIs, the absolute timing of the NM movements covaried with magnitude. The smaller movements (approximately, .11-.50 mm) were highly variable, and their peaks tended to occur well after the time of US delivery. The larger movements (>.50 mm) were less variable, and their peaks were better aligned with the time of US delivery. These results are discussed with respect to their implications for current models of timing in eyeblink conditioning.

Original languageEnglish
Pages (from-to)212-217
Number of pages6
JournalBehavioral Neuroscience
Volume123
Issue number1
DOIs
Publication statusPublished - Feb 2009
Externally publishedYes

Keywords

  • conditioning
  • interstimulus interval
  • rabbit
  • timing

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