TRUTHSCAN-A COMPUTERIZED INSTRUMENT FOR CREDIBILITY ASSESSMENT: Initial Field Testing Data For New Exculpatory Verification of Veracity Technology

Abstract

In Tansey,1 the results of an initial field study as to the efficacy ofTruthScan, a fully automated computerized instrument for credibility assessment, implemented on a NeXT computer running under Unix, were published. TruthScan's code has been rewritten and expanded under MSDOS enabling it to run on a portable computer. In this, it again utilizes standardized, computer delivered auditory stimuli, and the identical computer-scoring algorithm for picking "truth" as found in TruthScan's initial field-testing running under Unix. In the current MSDOS implementation, T ruthScan then computed four separate numeric verification indexes in the same manner as T ansey.l Two numeric verification indexes were computed for males. A numeric verification index was computed based on a commonly held "truthful" brainwave signature as well as a numeric verification index based on a commonly held "falsehood" brainwave signature (n ::: 10). Two numeric verification indexes were computed for females. A numeric verification index was computed based on a commonly held "truthful" brainwave signature as well as a numenc verification index based on a commonly held "falsehood" brainwave signature (n 10).