Behavioral contrast and response independent reinforcement

Area of Science:

• Behavioral psychology
• Animal behavior studies

Background:

• Behavioral contrast is a phenomenon where changes in reinforcement in one component of a multiple schedule alter responding in another component.
• Previous research suggests reinforcement density changes are key to behavioral contrast.

Purpose of the Study:

• To investigate if a reduction in response rate alone, without a change in reinforcement density, can elicit behavioral contrast in pigeons.
• To examine the role of response-independent reinforcement in the development of behavioral contrast.

Main Methods:

• Pigeons were trained on a multiple schedule with varying reinforcement conditions.
• One group received response-contingent reinforcement in one component and response-independent reinforcement in another.
• A second group received no reinforcement in the second component.

Main Results:

• The first group showed a reduced response rate in the second component but no behavioral contrast in the first.
• The second group exhibited behavioral contrast.
• These findings indicate that a simple reduction in responding is insufficient to cause behavioral contrast.

Conclusions:

• Behavioral contrast is not solely dependent on a decrease in response rate.
• The presence or absence of reinforcement in a component significantly influences the occurrence of behavioral contrast.
• Constant reinforcement density does not guarantee behavioral contrast if response rates are manipulated differently.