Combining skin conductance and forced choice in the detection of concealed information

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Abstract

An advantage of the concealed information polygraph test (CIT) is that its false positive rate is determined on statistical grounds, and can be set a priori at arbitrary low levels (i.e., few innocents declared guilty). This criterion, however, inevitably leads to a loss of sensitivity (i.e., more guilty suspects declared innocent). We explored whether the sensitivity of a CIT procedure could be increased by adding an independent measure that is based on an entirely different psychological mechanism. In two experiments, we explored whether the accuracy of a CIT procedure could be increased by adding Symptom Validity Testing (SVT), a relatively simple, forced-choice, self-report procedure that has previously been used to detect malingering in various contexts. Results of a feigned amnesia experiment but not from a mock crime experiment showed that a combination measure of both tests yielded better detection than either test alone.
Original languageEnglish
Pages (from-to)814-822
JournalPsychophysiology
Volume44
DOIs
Publication statusPublished - 1 Jan 2007

Cite this

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title = "Combining skin conductance and forced choice in the detection of concealed information",
abstract = "An advantage of the concealed information polygraph test (CIT) is that its false positive rate is determined on statistical grounds, and can be set a priori at arbitrary low levels (i.e., few innocents declared guilty). This criterion, however, inevitably leads to a loss of sensitivity (i.e., more guilty suspects declared innocent). We explored whether the sensitivity of a CIT procedure could be increased by adding an independent measure that is based on an entirely different psychological mechanism. In two experiments, we explored whether the accuracy of a CIT procedure could be increased by adding Symptom Validity Testing (SVT), a relatively simple, forced-choice, self-report procedure that has previously been used to detect malingering in various contexts. Results of a feigned amnesia experiment but not from a mock crime experiment showed that a combination measure of both tests yielded better detection than either test alone.",
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Combining skin conductance and forced choice in the detection of concealed information. / Meijer, E.H.; Smulders, F.T.Y.; Johnston, J.; Merckelbach, H.L.G.J.

In: Psychophysiology, Vol. 44, 01.01.2007, p. 814-822.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Meijer, E.H.

AU - Smulders, F.T.Y.

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