Preference reversal between impulsive and self-control choice.

Area of Science:

• Behavioral psychology
• Animal cognition
• Decision-making

Background:

• Understanding choice behavior is crucial in behavioral psychology.
• Temporal discounting explains how the perceived value of a reward decreases with delay.
• Concurrent-chains procedures are used to study choice under varying conditions.

Purpose of the Study:

• To investigate how pigeons choose between reinforcers with different delays and amounts.
• To examine preference reversal in choice behavior.
• To test predictions of temporal discounting models and contextual choice models.

Main Methods:

• Pigeons were trained on a concurrent-chains procedure with variable reinforcer delays and amounts.
• Initial-link response ratios measured preference between options.
• Dependent scheduling ensured outcome frequency was constant, isolating delay and amount effects.

Main Results:

• Pigeons preferred smaller-sooner reinforcers at short delays.
• Preference shifted towards larger-later reinforcers as delays increased, demonstrating preference reversal.
• Sensitivity to reinforcer amount increased with added delay, supporting specific theoretical models.

Conclusions:

• Pigeon choice behavior exhibits preference reversal, influenced by delay and amount.
• Findings support theoretical models of temporal discounting and contextual choice.
• This research provides insights into the fundamental mechanisms of decision-making under delay.