The partial-reinforcement extinction effect and the contingent-sampling hypothesis.

Area of Science:

• Behavioral Psychology
• Decision Making
• Reinforcement Learning

Background:

• The partial-reinforcement extinction effect (PREE) suggests partial reinforcement enhances learning robustness compared to full reinforcement.
• Laboratory findings support PREE, but field research has yielded contradictory results, necessitating further investigation.

Purpose of the Study:

• To reconcile conflicting findings on the partial-reinforcement extinction effect (PREE).
• To investigate how the attractiveness of alternative behaviors influences the PREE in real-world scenarios.

Main Methods:

• Two experiments were conducted to examine the PREE under varying reinforcement schedules and alternative option attractiveness.
• A contingent-sampling model was employed to analyze decision-making patterns based on past reward experiences.

Main Results:

• Partial reinforcement increased selection of the promoted option during extinction but had a smaller positive impact than its negative training-phase effect.
• The overall effect of partial reinforcement was inversely related to the alternative option's attractiveness: negative for attractive alternatives, positive for unattractive ones.

Conclusions:

• The PREE's applicability is contingent on the context, particularly the perceived value of alternative behaviors.
• A contingent-sampling model, defining similarity by recent outcome sequences, effectively explains these nuanced reinforcement effects.