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Surprising sounds influence risky decision making.

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Unexpected sounds can increase risk-taking and reduce decision-making errors in humans. These auditory prediction errors influence choices, impacting adaptive behavior and daily decision-making processes.

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Area of Science:

  • Cognitive Neuroscience
  • Decision Science
  • Auditory Perception

Background:

  • Adaptive behavior relies on navigating environmental uncertainty.
  • Incidental sensory events can either distract or lead to rigid responses.
  • The impact of task-irrelevant sensory prediction errors on decision-making is not fully understood.

Purpose of the Study:

  • To investigate how task-irrelevant sensory prediction errors influence risky decision-making in humans.
  • To determine if auditory prediction errors increase risk-taking or choice perseveration.

Main Methods:

  • Seven experiments with 1600 human participants were conducted.
  • Rare auditory sequences were presented before option presentation.
  • Computational modeling and control experiments were used to analyze effects.

Main Results:

  • Rare auditory sequences significantly increased risk-taking and decreased choice perseveration.
  • Risk-taking and perseveration effects were dissociable based on auditory statistics.
  • Effects were explained by value-independent risky bias and perseveration parameters, linked to dopamine.

Conclusions:

  • Incidental auditory prediction errors can systematically bias human decision-making towards risk-taking and reduced perseveration.
  • These findings suggest that even irrelevant sounds can influence everyday choices.
  • The observed effects are not due to increased decision noise or erroneous beliefs.