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Trial spacing is a determinant of cue interaction
Steven C Stout1, Raymond Chang, Ralph R Miller
1Department of Psychology, State University of New York at Binghamton, Binghamton, New York 13902-6000, USA.
Journal of Experimental Psychology. Animal Behavior Processes
|February 4, 2003
Summary
Trial spacing significantly impacts how rats learn associations between stimuli and outcomes. Massed training can eliminate overshadowing, while spaced training reverses typical learning effects, influencing extinction responses.
Area of Science:
- Behavioral neuroscience
- Animal learning and behavior
Background:
- Cue interaction in associative learning is influenced by training parameters.
- The role of trial spacing in phenomena like overshadowing requires further investigation.
Purpose of the Study:
- To investigate the effect of trial spacing on cue interaction in rats.
- To examine how massed versus spaced training affects associative learning and extinction.
Main Methods:
- Four experiments using conditioned lick suppression paradigms in rats.
- Manipulation of trial spacing (massed vs. spaced) during compound stimulus-acquisition and extinction phases.
- Assessment of responding to conditioned stimuli and contextual cues.
Main Results:
- Overshadowing was eliminated under massed compound stimulus-outcome pairings.
- Reversed trial spacing effects were observed with compound acquisition trials.
- Extinction effects were dependent on whether acquisition pairings were massed or spaced.
- Conditioning and devaluation results were associative and stimulus-specific.
Conclusions:
- Trial spacing critically modulates cue interaction and associative strength.
- Findings support the extended comparator hypothesis regarding associative learning principles.