title: Timing in trace conditioning of the nictitating membrane response of the rabbit (Oryctolagus cuniculus): scalar, nonscalar, and adaptive features.
abstract: Using interstimulus intervals (ISIs) of 125, 250, and 500 msec in trace conditioning of the rabbit nictitating membrane response, the offset times and durations of conditioned responses (CRs) were collected along with onset and peak latencies. All measures were proportional to the ISI, but only onset and peak latencies conformed to the criterion for scalar timing. Regarding the CR's possible protective overlap of the unconditioned stimulus (US), CR duration increased with ISI, while the peak's alignment with the US declined. Implications for models of timing and CR adaptiveness are discussed.
authors.affiliation: School of Psychology, University of New South Wales, Sydney, New South Wales 2052, Australia. j.kehoe@unsw.edu.au
authors.forename: E James
authors.initials: EJ
authors.lastname: Kehoe
authors.forename: Elliot A
authors.initials: EA
authors.lastname: Ludvig
authors.forename: Richard S
authors.initials: RS
authors.lastname: Sutton
mesh_terms: D000161:Acoustic Stimulation; D000818:Animals; D003214:Conditioning, Classical / Q000502:physiology*; D003215:Conditioning, Eyelid / Q000502:physiology*; D009541:Nictitating Membrane / Q000502:physiology*; D011817:Rabbits; D013997:Time Factors