title: Increased spontaneous recovery with increases in conditioned stimulus alone exposures.
abstract: A series of experiments used the compound test procedure (Rescorla, 2002) to measure the size of spontaneous recovery of freezing responses by rats to a latently inhibited and/or extinguished conditioned stimulus (CS). The size of recovery was greater: to a pre-exposed and conditioned CS than to a CS just conditioned or just pre-exposed; to an extensively pre-exposed or extinguished CS than to a moderately pre-exposed or extinguished CS; and to a pre-exposed and extinguished CS than to a CS just pre-exposed or just extinguished. These results show that the size of recovery is proportional to the size of the depression produced by CS-alone exposures regardless of whether they occurred before, after, or both before and after conditioning. The results are discussed in terms of some contemporary models of recovery and of the inferences permitted by the use of the compound assessment technique.
authors.affiliation: School of Psychology, University of New South Wales, Sydney, New South Wales 2052, Australia.
authors.forename: Hiu Tin
authors.initials: HT
authors.lastname: Leung
authors.forename: R Frederick
authors.initials: RF
authors.lastname: Westbrook
mesh_terms: D000161:Acoustic Stimulation / Q000009:adverse effects; D000818:Animals; D001522:Behavior, Animal; D003214:Conditioning, Classical / Q000502:physiology*; D004192:Discrimination, Psychological; D005108:Extinction, Psychological / Q000502:physiology; D005239:Fear / Q000523:psychology; D046352:Freezing Reaction, Cataleptic / Q000502:physiology; D007266:Inhibition, Psychological; D008297:Male; D011571:Psychoacoustics; D051381:Rats; D017208:Rats, Wistar; D013997:Time Factors