Criterion Development and Validity of the CQT in Field Application (original) (raw)

Journal of General Psychology, 1996

Abstract

A field study of the control question test (CQT) for the detection of deception was conducted. Data from the files of 41 criminal cases were examined for confirming information and were rated by two evaluators on the strength of the confirming information. Those ratings were found to be highly reliable, r = .94. Thirty-two of the cases were found to have some independent confirmation. Numerical scores and decisions from the original examiners and an independent evaluation were analyzed. The results indicated that the CQT was a highly valid discriminator. Excluding inconclusives, the decisions of the original examiners were correct 96% of the time, and the independent evaluations were 93% correct. These results suggest that criteria other than confession can be developed and used reliably. In addition, the validity of the CQT in real-world settings was supported.

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