Matching and contrast on several concurrent treadle-press schedules

Area of Science:

• Behavioral psychology
• Animal behavior studies
• Operant conditioning research

Background:

• Pigeons (White King) were studied to understand their response to food reinforcement.
• Concurrent variable-interval variable-interval schedules were employed to analyze choice behavior.

Purpose of the Study:

• To investigate how pigeons adjust their responding under concurrent schedules with varying reinforcement rates.
• To observe the occurrence of behavioral contrast in pigeons under these conditions.

Main Methods:

• Four pigeons were trained to press treadles for food rewards.
• Two concurrent variable-interval schedules were used, one with a constant reinforcement rate (30/hr) and the other with a variable rate (120, 60, 15, 30/hr).

Main Results:

• Pigeons' relative response rates in each component schedule matched the relative rates of reinforcement provided.
• Behavioral contrast was observed, demonstrating an inverse relationship between responding in the constant schedule and reinforcement in the variable schedule.

Conclusions:

• Pigeon behavior aligns with reinforcement principles, adjusting relative responding to match relative reinforcement.
• Behavioral contrast is a reliable phenomenon in pigeons under concurrent variable-interval schedules.