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Related Experiment Videos

Response bias in plaintiffs' histories

P R Lees-Haley1, C W Williams, N D Zasler

  • 1Lees-Haley Psychological Corporation, Woodland Hills, CA, USA.

Brain Injury
|November 14, 1997
PubMed
Summary

Litigants may exaggerate pre-injury symptoms due to response bias. Forensic examiners must consider this systematic error in self-report data when assessing traumatic brain injury and related emotional distress claims.

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Area of Science:

  • Neuroscience
  • Psychology
  • Forensic Science

Background:

  • Self-reported data is crucial for assessing traumatic brain injury (TBI) and toxic brain injury (TBI).
  • Response bias, a systematic error in self-reporting, can impact the accuracy of these assessments.
  • Understanding response bias in litigants is essential for forensic evaluations.

Purpose of the Study:

  • To investigate response bias in self-reported history of factors relevant to TBI and toxic brain injury.
  • To compare self-reported cognitive and emotional functioning between litigating and non-litigating individuals.
  • To determine the influence of response bias on forensic assessments.

Main Methods:

  • A total of 446 subjects (131 litigating, 315 non-litigating) completed a symptom questionnaire.

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  • Data collected from diverse populations including university faculty/students, clinic patients, and individuals undergoing forensic evaluations.
  • Compared self-reported pre-injury and current functioning ratings between litigant and non-litigant groups.

    • Main Results:

    • Plaintiffs (litigants) rated their pre-injury functioning as superior compared to non-plaintiffs.
    • This finding persisted despite no a priori reason to assume plaintiffs were healthier.
    • Suggests a potential response bias in self-reported history among individuals involved in litigation.

    Conclusions:

    • Response bias is a significant factor in self-reported data for TBI and toxic brain injury assessments.
    • Forensic examiners must critically evaluate litigants' self-reports of pre-injury status.
    • Accounting for response bias is crucial for accurate forensic neuropsychological evaluations.