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Second-order schedules: discrimination of components.
Journal of the Experimental Analysis of Behavior
|September 1, 1975
Summary
Pigeons struggled to distinguish between components in second-order schedules without unique visual cues. Adding distinct key colors improved discrimination, showing the importance of external signals for behavioral control in pigeons.
Area of Science:
- Behavioral psychology
- Animal cognition
- Operant conditioning
Background:
- Second-order schedules of reinforcement involve complex temporal patterns.
- Understanding stimulus control is crucial for analyzing animal behavior.
- Pigeons are often used as models for studying learning and decision-making.
Purpose of the Study:
- To investigate pigeons' ability to discriminate between components of second-order schedules.
- To determine the effect of unique external cues on component discrimination.
- To explore the role of discriminability in response rates within schedules.
Main Methods:
- Pigeons were exposed to second-order schedules with varying numbers of fixed-interval components.
- A response on a specific key was required to obtain reinforcement after the final component.
- Experiment 3 introduced unique key colors for each component to test cue effects.
Main Results:
- Pigeons failed to discriminate components without unique cues, responding frequently before the final component.
- Punishment of premature responses did not improve discrimination.
- Introducing distinct key colors for each component led to precise responding only during the final component.
Conclusions:
- Pigeons exhibit poor discrimination of second-order schedule components without distinct exteroceptive cues.
- The presence of unique cues significantly enhances stimulus control and discriminability.
- Differences in component discriminability may explain variations in response rates across different schedule types.