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Choice history biases in dyadic decision making.

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Area of Science:

  • Cognitive psychology
  • Neuroscience
  • Decision-making research

Background:

  • Perceptual decisions are influenced by past choices (choice history bias).
  • Previous research primarily used single-subject designs, limiting generalizability.
  • The brain's adaptation to environmental uncertainty may involve history-dependent processes.

Purpose of the Study:

  • Investigate choice history bias in a dual-participant setting.
  • Test hypotheses regarding the weighting of own versus partner's decision history.
  • Determine if partner's decisions influence individual choices.

Main Methods:

  • Dyads performed a shared perceptual decision-making task.
  • Statistical modeling using generalized linear models was employed.
  • Choice data from pairs were analyzed to fit competing hypotheses.

Main Results:

  • Own and partner's trial history are not independent.
  • Partner's decisions induced choice alternation bias (1-back).
  • Own decisions induced choice repetition bias (1-back and 2-back).

Conclusions:

  • Individuals do not ignore partners' decisions in shared tasks.
  • Partner decisions are weighted qualitatively differently from own decisions.
  • This suggests a complex interplay in dyadic decision-making and environmental adaptation.