Fast decisions reflect biases, slow decisions do not.

Area of Science:

• Decision-making science
• Social psychology
• Behavioral economics

Background:

• Group decisions involve individuals with varying biases and information quality.
• Understanding how these factors influence collective outcomes is crucial.

Approach:

• Analyzed decision-making in large groups of independent agents accumulating evidence.
• Derived asymptotic expressions for the large population limit.
• Quantified the impact of initial biases on decision order and accuracy.

Key Points:

• Early decision-makers in groups are strongly influenced by their initial biases, potentially diverging from the truth.
• Later decision-makers tend to act as if unbiased, leading to more accurate choices.
• Bias, information quality, and the order of decisions interact complexly.

Conclusions:

• The reliability of group decisions is significantly shaped by the interplay of individual biases, information quality, and the sequence of decision-making.
• Insights into optimizing group decision processes and mitigating bias are provided.