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Detection of feigned memory impairments using a Chinese word task.

Ellen G Y Mak1, Tatia M C Lee

  • 1Department of Psychology, The University of Hong Kong.

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Detecting feigned memory impairments is possible using a forced-choice task. Accuracy, not response time, effectively identified deception, suggesting cut-off scores are superior to chance criteria for detecting faking.

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Area of Science:

  • Cognitive Psychology
  • Neuropsychology
  • Forensic Psychology

Background:

  • Memory impairment assessment is crucial in clinical and forensic settings.
  • Distinguishing genuine deficits from feigned memory impairments (faking) presents diagnostic challenges.
  • Existing methods for detecting deception in memory testing require further validation.

Purpose of the Study:

  • To investigate the efficacy of a forced-choice task in detecting feigned memory impairments.
  • To examine the influence of task difficulty on accuracy and response time during deception detection.
  • To compare different criteria (cut-off score, below-chance, response time) for identifying faking.

Main Methods:

  • A simulation design was employed with 85 participants (42 males, 43 females).
  • Participants completed a forced-choice task using Chinese words under both control and faking conditions.
  • Performance metrics, including accuracy and response time, were systematically measured.

Main Results:

  • Significant differences in both accuracy and response time were found between control and faking conditions.
  • Task difficulty significantly impacted accuracy, but not response time.
  • The cut-off score criterion demonstrated higher classification accuracy for detecting deception compared to below-chance or response time criteria.

Conclusions:

  • The forced-choice task is a viable tool for detecting feigned memory impairments.
  • Accuracy-based cut-off scores are more effective than chance-based criteria or response time for identifying deceptive performance.
  • Findings have implications for improving the reliability of memory assessments in identifying malingering.