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Using response time measures to assess guilty knowledge
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DOI：10.1037/0021-9010.85.1.30.png)
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Abstract
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How fan a suspect's guilt or innocence be reliably tested? The validity of the the polygraph, which measures changes in physiological arousal during a guilty knowledge' test, is controversial (e.g., T. R. Bashore & P. E. Rapp, 1993; T. P. Cross & L. Saxe, 1992; D. T. Lykken, 1998; J. P. Rosenfeld, 1995: R, Steinbrook, 1992). One alternative to the polygraph examines event-related potentials recorded during a memory interference task (L. A. Farwell & E. Donchin, 1991). The present study extended this paradigm to determine whether response times (RTs) can accurately identify participants possessing specific guilty knowledge. Results from Experiment 1 showed that RT alone can reliably discriminate guilty from innocent participants. Experiments 2a and 2b indicated that an RT-based paradigm is more resistant to strategic manipulation than previously suggested (Farwell & Donchin, 1991). This RT-based paradigm may be a viable alternative to the polygraph for detecting guilty knowledge.
Keywords:
LIE DETECTION
ALTERNATIVES
POLYGRAPHY
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