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Dubious decision evidence and criterion flexibility in recognition memory.

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Participants often fail to adjust their decision criteria in memory tasks, even when accuracy depends on it. This study shows people over-rely on memory evidence, hindering optimal performance in recognition judgments.

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criterion shiftingdecision makingfeedbackrecognitionresponse bias

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Area of Science:

  • Cognitive Psychology
  • Human Memory
  • Decision Making

Background:

  • Optimal accuracy in old-new recognition tasks relies on appropriate decision criteria, especially with ambiguous memory evidence.
  • Individuals frequently exhibit suboptimal placement of decision criteria, leading to reduced accuracy.
  • A parsimonious explanation for suboptimal criteria is an over-reliance on memory evidence, irrespective of its reliability.

Purpose of the Study:

  • To test the hypothesis that individuals over-rely on memory evidence, leading to suboptimal decision criteria in recognition tasks.
  • To investigate how different motivational factors (changing probabilities, security scenarios, financial incentives) influence criterion placement.
  • To determine the effectiveness of feedback in improving criterion placement under various motivational conditions.

Main Methods:

  • A novel recognition paradigm with minimal old-new discrimination was employed.
  • Experiments involved manipulating target probabilities, introducing a 'security patrol' scenario, and offering financial incentives.
  • Criterion shifts were analyzed across different motivational conditions and in response to feedback.

Main Results:

  • Critical errors (misses and false alarms) were frequent across all motivational conditions.
  • The frequency of critical errors was similar regardless of the source of motivation (e.g., probabilities, incentives).
  • Feedback provided only a moderate reduction in critical errors.

Conclusions:

  • Participants demonstrate a tendency to rely heavily on memory evidence, even when it is non-probative.
  • This over-reliance on memory evidence serves as an alternative to adhering to a decision rule, preventing optimal criterion placement.
  • Motivational factors and feedback have limited impact on improving criterion placement when this fundamental reliance on evidence persists.