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Intractable properties of responding under a fixed-interval schedule.
Journal of the Experimental Analysis of Behavior
|March 1, 1982
Summary
This study on fixed-interval schedules found that response number weakly influences behavior across intervals. Experimental changes did not strengthen this control, suggesting stimulus conditions at interval onset are dominant.
Area of Science:
- Behavioral Psychology
- Animal Behavior
- Operant Conditioning
Background:
- Fixed-interval (FI) schedules of reinforcement often produce variable response patterns.
- Understanding interval-to-interval dynamics is crucial for predicting behavioral variability.
- The role of response number in controlling subsequent behavior under FI schedules requires further investigation.
Purpose of the Study:
- To further assess the magnitude of interval-to-interval dynamics in pigeon behavior.
- To explore conditions that might enhance control by response number for subsequent output.
- To investigate the influence of stimulus conditions at interval onset on behavior.
Main Methods:
- Pigeons were exposed to a fixed-interval five-minute schedule.
- Three manipulations were introduced: a response-contingent stimulus counter, differential reinforcement of high response output, and a yoked irregular clock.
- Behavioral data were collected after response stabilization under each condition.
Main Results:
- Response number exerted a weak influence on behavior from one interval to the next.
- Experimental manipulations did not significantly enhance control by response number.
- Behavior was primarily controlled by stimulus conditions present at the beginning of each interval.
Conclusions:
- Response number has limited control over interval-to-interval dynamics under FI schedules.
- The experimental manipulations tested were ineffective in strengthening response number control.
- Stimulus control at interval onset appears to be the dominant factor in shaping behavior under these FI conditions.