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Related Experiment Videos

Daubert, cognitive malingering, and test accuracy.

Douglas Mossman1

  • 1Division of Forensic Psychiatry, Wright State University School of Medicine, University of Dayton School of Law, Dayton, Ohio, USA. douglas.mossman@wright.edu

Law and Human Behavior
|June 11, 2003
PubMed
Summary

This study examines the Daubert standard for admitting expert testimony on malingered cognitive deficits. It demonstrates that a proposed mathematical criterion may misinterpret malingering test results, offering a clearer understanding for legal and clinical use.

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Area of Science:

  • Forensic Psychology
  • Neuropsychology
  • Legal Medicine

Background:

  • The Daubert standard (1993) mandates scientific validity for expert testimony.
  • Vallabhajosula and van Gorp (2001) proposed a mathematical criterion for malingering tests.
  • This criterion suggests a posttest probability of at least .8 for a positive malingering test score, given a .3 pretest probability.

Purpose of the Study:

  • To analyze the mathematical properties of malingering measures in the context of the Daubert standard.
  • To address potential misunderstandings arising from the V & vG (2001) criterion for malingering tests.
  • To provide mental health experts with a framework for responding to Daubert-inspired challenges.

Main Methods:

  • Review of legal cases discussing Daubert and malingered cognitive deficits.

Related Experiment Videos

  • Analysis of data from the Test of Memory Malingering (T.N. Tombaugh, 1996).
  • Description of how pretest probability and test performance inform posttest probability of malingering.

    • Main Results:

    • The V & vG (2001) criterion may lead to misinterpretations of malingering test information.
    • Malingering measures possess specific mathematical properties that influence diagnostic accuracy.
    • A method is presented for combining prior knowledge with test data to estimate posttest malingering probability.

    Conclusions:

    • The mathematical criterion proposed by V & vG (2001) requires careful consideration to avoid misapplication.
    • Understanding the mathematical characteristics of malingering tests is crucial for their valid use in legal and clinical settings.
    • This paper offers guidance for experts to defend their conclusions based on malingering assessments against Daubert challenges.