Decisions from experience: how groups and individuals adapt to change

Area of Science:

• Cognitive Psychology
• Behavioral Economics
• Decision Sciences

Background:

• Extensive research compares group vs. individual decision-making on static tasks.
• Limited understanding exists on how groups and individuals adapt to changing decision environments.

Purpose of the Study:

• To investigate group and individual performance in dynamic decision-making environments.
• To analyze adaptation to unexpected changes in underlying probabilities.

Main Methods:

• Experimental design involving decisions from experience.
• Introduction of unexpected changes in decision environment probabilities after initial trials.
• Comparison of group performance against individual performance and Bayesian updating benchmark.

Main Results:

• Groups outperformed individuals in stable decision environments.
• Group superiority vanished after environmental changes.
• Group performance more closely approximated Bayesian updating, suggesting better memory initially.
• Groups exhibited delayed adaptation to environmental shifts.

Conclusions:

• Group decision-making does not inherently hinder adaptation to environmental change.
• Observed delayed adaptation in groups stems from coordinated responses, mimicking enhanced memory.
• Findings challenge assumptions about group routines impeding dynamic adjustments.