Polygraph usage Create Talk0 Category page This page needs content. You can help by adding a sentence or a photo! Add to this page! “ Assessment | Biopsychology | Comparative | Cognitive | Developmental | Language | Individual... Guilty Knowledge Test Pages in category "Polygraph usage" This category contains only the following page. G Guilty Knowledge Test Retrieved from "http://psychology.wikia.com/wiki/Category:Polygraph_usage"