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Value-based attention but not divisive normalization influences decisions with multiple alternatives.

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Summary
This summary is machine-generated.

Researchers failed to replicate a distractor effect in decision-making. However, distractor value influenced attention, suggesting value-based attention impacts choices and response times.

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Area of Science:

  • Cognitive neuroscience
  • Neuroeconomics
  • Decision-making research

Background:

  • Violations of economic rationality are key to understanding decision-making.
  • A prior study linked distractor value to reduced choice accuracy via neural normalization.

Purpose of the Study:

  • To replicate the distractor effect on choice accuracy.
  • To test the role of value-based attention as an alternative explanation.

Main Methods:

  • Two preregistered experiments: direct replication and eye-tracking.
  • Computational modeling of decision-making processes.

Main Results:

  • The distractor effect on choice accuracy was not replicated.
  • Distractor value dynamically influenced eye-tracking fixations to distractors.
  • Value-based attention mechanisms explained observed effects.

Conclusions:

  • The original distractor effect could not be replicated.
  • Value-based attention, not divisive normalization, may mediate distractor influences.
  • Extended decision-making models incorporating attention offer comprehensive explanations.