What Is the Utah Probable Lie Technique?
The Utah Probable Lie Technique (UPLT) is a CQT format developed at the University of Utah from the 1970s. Distinctive features include: relevant questions not bracketed by comparison questions; inclusion of the photoplethysmograph; rotating comparison questions; up to five charts; and symmetric ±6 cutoffs. It has more peer-reviewed support than any other probable-lie technique.
References
See: Handler (2006); Raskin & Honts (2002).