A Field Validation Study of the Integrated Zone Comparison Technique (IZCT)

by Nathan J. Gordon, William L. Fleisher, Hisham Morsie, Walid Habib and Khaled Salah


This field study tested the validity of the Integrated Zone Comparison Technique (IZCT) designed for specific issue tests, utilizing 309 confirmed field cases by examiners of the Egyptian Government. During 1998 and 1999 the IZCT correctly identified 100% of the innocent examinees and 99.5% of the guilty examinees, excluding Inconclusives, or 94.8% of innocent examinees and 90.5% of the deceptive examinees, including Inconclusives. A detailed explanation of the technique is included in this report.

The complete study can be found in Volume 29, Number 3, 2000, of Polygraph, official journal of the American Polygraph Association.