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Within-session responding as a function of post-session feedings
F K McSweeney1, J Hatfield, T M Allen
1Department of Psychology, Washington State University, Pullman, WA 99164-4830, USA.
Behavioural Processes
|June 5, 2014
Summary
Rat lever pressing for food rewards showed no significant difference in response rates when post-session feedings were delayed versus immediate. This suggests reward timing may not always influence behavior within a session.
Area of Science:
- Behavioral neuroscience
- Animal behavior studies
- Operant conditioning research
Background:
- Previous research suggested delayed post-session feeding might increase response rates.
- Understanding reward timing is crucial for behavioral theories.
- Operant conditioning principles guide animal learning studies.
Purpose of the Study:
- To investigate the effect of delayed post-session feeding on rat lever-pressing behavior.
- To determine if rats integrate rewards across different temporal locations.
- To re-evaluate the role of feeding delay in operant conditioning models.
Main Methods:
- Ten rats were trained to press levers for food rewards under a multiple variable interval schedule.
- The delay between session completion and post-session feeding was manipulated (0 to 240 minutes).
- Response rates were recorded and analyzed in relation to feeding delay and session progression.
Main Results:
- Response rates did not significantly differ between immediate and delayed post-session feeding conditions.
- Rats exhibited within-session response rate changes (increase then decrease) irrespective of feeding delay.
- Findings contradict previous reports suggesting delayed reinforcement enhances responding.
Conclusions:
- The temporal location of post-session feeding may not be a critical variable influencing within-session responding.
- Behavioral theories may not always need to incorporate reward timing across locations.
- Future experiments should control for within-session response rate fluctuations to avoid confounding results.
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