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Outcome pre- and postexposure effects: retention interval interacts with primacy and recency
Kouji Urushihara1, Daniel S Wheeler, Ralph R Miller
1Department of Psychology, State University of New York at Binghamton, Binghamton, NY 13902-6000, USA.
Journal of Experimental Psychology. Animal Behavior Processes
|October 28, 2004
Summary
Outcome-alone exposure effects in rats depend on memory retrievability. Initially, recent exposure interferes more, but over time, earlier exposure becomes more influential, impacting conditioned suppression.
Area of Science:
- Behavioral neuroscience
- Learning and memory
Background:
- Sensory preconditioning paradigms investigate associative learning.
- Understanding how exposure timing affects memory retrieval is crucial for learning theories.
Purpose of the Study:
- To investigate the effects of outcome-alone pretraining and posttraining exposure on conditioned suppression in rats.
- To determine the role of memory retrievability in outcome-alone exposure effects within a sensory preconditioning framework.
Main Methods:
- Conditioned suppression experiments were conducted using a sensory preconditioning preparation with rats.
- Outcome-alone pretraining and posttraining exposure were manipulated.
- Retention intervals and priming stimuli were varied across experiments.
Main Results:
- Outcome postexposure interference was stronger than outcome preexposure interference, indicating a recency effect.
- With longer retention intervals, outcome preexposure produced more interference than outcome postexposure, suggesting a shift from recency to primacy.
- Priming stimuli also induced a shift from recency to primacy effects.
Conclusions:
- Memory retrievability significantly influences outcome-alone exposure effects in sensory preconditioning.
- The temporal dynamics of memory retrieval (recency vs. primacy) are critical determinants of associative learning outcomes.