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Related Experiment Videos

Using response time measures to assess "guilty knowledge".

T L Seymour1, C M Seifert, M G Shafto

  • 1Department of Psychology, University of Michigan, Ann Arbor 48109-1109, USA. nogard@umich.edu

The Journal of Applied Psychology
|March 31, 2000
PubMed
Summary
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This study explored using response times (RTs) to detect guilty knowledge, offering a potential alternative to the controversial polygraph. Results show RTs can reliably identify guilty individuals and resist manipulation.

Area of Science:

  • Cognitive Psychology
  • Forensic Science
  • Neuroscience

Background:

  • The polygraph's validity in assessing guilt is debated.
  • Existing alternatives, like event-related potentials, have limitations.

Purpose of the Study:

  • To investigate response times (RTs) as a method for detecting guilty knowledge.
  • To assess the reliability and resistance to manipulation of an RT-based paradigm.

Main Methods:

  • An event-related potential memory interference task was adapted.
  • Participants completed tasks measuring response times to assess guilty knowledge.
  • Experiments 2a and 2b tested the paradigm's resistance to strategic manipulation.

Main Results:

Related Experiment Videos

  • Response times alone reliably discriminated between "guilty" and "innocent" participants.
  • The RT-based paradigm demonstrated greater resistance to manipulation than previously suggested.

    • Conclusions:

    • Response time measurement is a promising, reliable method for detecting guilty knowledge.
    • This RT-based paradigm may serve as a viable alternative to the polygraph.