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Abstract

Dollins, A. B., Krapohl, D. J., & Dutton, D. W. (1999) A comparison of computer programs designed to evaluate psychophysiological detection of deception examinations: Bakeoff 1. , (DoDPI99-R-0001). Fort. Jackson, SC: Department of Defense Polygraph Institute. DTIC#, ADA379990

DOLLINS, A. B., KRAPOHL, D. J., & DUTTON, D. W. A comparison of computer programs designed to evaluate psychophysiological detection of deception examinations: Bakeoff 1. October 1999, Report No. DoDPI99-R-0001. Department of Defense Polygraph Institute, Ft. Jackson, SC 29207.

This preliminary study was completed to determine if accuracy differences exist among computer programs designed to render decisions using data collected during psychophysiological detection of deception (PDD) examinations. The vendors of AXCON version 1.2, Chart Analysis version 5.1-090-17-097, Computerized Polygraph System version 2.2, Identifi version 1.43, and PolyScore version 4.0 participated in the project. The data from 97 PDD examinations (56 deceptive and 41 nondeceptive), for which examinee veracity was known only to the investigators, were sent to software vendors with the request that a decision of deception indicated, no deception indicated, or no opinion (e.g., inconclusive) be returned for each examination--using the vendors' software. The proportion of correct, erroneous, and no opinion decisions rendered by the five evaluated computer programs ranged from .71 to .77, .07 to .10, and .13 to .21, respectively. When no opinion decisions were excluded, the proportion of correct decisions ranged from .88 to .91. There were no statistically significant differences among the frequency of correct decisions, erroneous decisions, and no opinion decisions rendered by the five computer programs. There was no single examination in the data set that all of the computer programs classified as no opinion. Finally, all of the computer programs, except the Computerized Polygraph System, erroneously classified more nondeceptive examinees as deceptive (i.e., false positive) than deceptive examinees as nondeceptive (i.e., false negative).

Key-words: PDD, lie detection, computer program, software, comparison, veracity, accuracy, Chart Analysis, CPS, Identifi, PolyScore.