Outcome pre- and postexposure effects: retention interval interacts with primacy and recency.
Effects of outcome-alone pretraining and posttraining exposure were investigated in conditioned suppression experiments conducted within a sensory preconditioning preparation with rats. Experiment 1 found that interference by outcome postexposure was stronger than that by outcome preexposure, suggesting a recency effect. Experiment 2 found that after a long retention interval, outcome preexposure produced more interference than outcome postexposure, suggesting a shift from recency to primacy with increasing retention interval. Experiment 3 showed that presentation of a priming stimulus that had been embedded within the earlier phase of treatment also caused a shift from recency to primacy. These results suggest that, at least in a sensory preconditioning paradigm, retrievability of outcome-alone exposure memory is an important determinant of any outcome-alone exposure effect.
Urushihara
Kouji
K
Department of Psychology, State University of New York at Binghamton, Binghamton, NY 13902-6000, USA.
Wheeler
Daniel S
DS
Miller
Ralph R
RR
D000818:Animals; D003214:Conditioning, Classical; D005108:Extinction, Psychological; D005260:Female; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D012055:Reinforcement Schedule