body \u00a0to \u00a0respond; \u00a0noise, \u00a0sights, \u00a0being \u00a0touched, \u00a0telling \u00a0a \u00a0lie, \u00a0even random<\/p>\n\n\n\n
thoughts. The examiner must structure the testing situation to eliminate or control extraneous<\/p>\n\n\n\n
sources of reactions. For example, repeating the test questions several times controls responses<\/p>\n\n\n\n
to random thoughts. The examiner\u2019s diagnosis of deception is aninference based upon<\/strong><\/p>\n\n\n\n the elimination of alternative causes of responses.<\/strong><\/p>\n\n\n\n 1) Respiration.<\/strong><\/p>\n\n\n\n 2) Electro dermal activity.<\/strong><\/p>\n\n\n\n 3) Cardio changes.<\/strong><\/p>\n\n\n\n 4) Photoelectric Plethysmograph.<\/strong><\/p>\n\n\n\n The Photo Plethysmograph adds new physiological data to existing polygraph information by measuring relative changes in the total blood volume in a body segment and by rapidly<\/p>\n\n\n\n detecting any changes in pulse blood volume. The Photo Plethysmograph uses a photo-sensitive<\/p>\n\n\n\n cell to measure infrared light reflected or passed though human tissue. The light is scattered by<\/p>\n\n\n\n red blood cells so that the amount of light reaching the photo sensor after passing through the<\/p>\n\n\n\n tissue indicates the amount of blood that it had to pass through. Empirical research on the<\/p>\n\n\n\n effectiveness of the Photo Plethysmograph has revealed that this technique provides an<\/p>\n\n\n\n independent index of sympathetic arousal and that the underlying physiological principles of<\/p>\n\n\n\n the Photo Plethysmograph are scientifically based and reliable.<\/p>\n\n\n\n For example:<\/strong>\u201cDid you commit this crime?<\/p>\n\n\n\n (2) Irrelevant question: <\/strong>Totally unconnected to the matter under investigation. <\/p>\n\n\n\n For example:<\/strong>\u201cIs today Wednesday?<\/p>\n\n\n\n (3) Comparison question: <\/strong>Only indirectly related to the matter being investigated. The<\/p>\n\n\n\n Question is designed to either provoke a lie, or to create concern about whether or not the<\/p>\n\n\n\n examinee is concealing information from the examiner.<\/p>\n\n\n\n For example: <\/strong>\u201cBefore the age of 20, have you ever deliberately told a serious lie, to<\/p>\n\n\n\n someone that trusted you?<\/p>\n\n\n\n Innocent Examinee<\/strong><\/p>\n\n\n\n The innocent examinee is answering the relevant questions truthfully. He \/ she is lying to or<\/p>\n\n\n\n doubtful about the comparison questions, which now have greater signal value. He \/ she thus<\/p>\n\n\n\n react more or greater to the comparison questions than relevant questions.<\/p>\n\n\n\n Guilty Examinee<\/strong><\/p>\n\n\n\n The guilty examinee is lying to both the comparison questions and relevant questions, but is<\/p>\n\n\n\n more concerned about him or her lie to the relevant questions because of their signal value and<\/p>\n\n\n\n fear of detection. He or she thus reacts more or greater to relevant questions than to the<\/p>\n\n\n\n comparison questions.<\/p>\n","protected":false},"excerpt":{"rendered":" body \u00a0to \u00a0respond; \u00a0noise, \u00a0sights, \u00a0being \u00a0touched, \u00a0telling \u00a0a \u00a0lie, \u00a0even random thoughts. The examiner must structure the testing situation to eliminate or control extraneous sources of reactions. For example, repeating the test questions several times controls responses to random thoughts. The examiner\u2019s diagnosis of deception is aninference based upon the elimination of alternative causes…
Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-52","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/globalpolygraph.co.za\/index.php?rest_route=\/wp\/v2\/pages\/52","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/globalpolygraph.co.za\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/globalpolygraph.co.za\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/globalpolygraph.co.za\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/globalpolygraph.co.za\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=52"}],"version-history":[{"count":1,"href":"https:\/\/globalpolygraph.co.za\/index.php?rest_route=\/wp\/v2\/pages\/52\/revisions"}],"predecessor-version":[{"id":53,"href":"https:\/\/globalpolygraph.co.za\/index.php?rest_route=\/wp\/v2\/pages\/52\/revisions\/53"}],"wp:attachment":[{"href":"https:\/\/globalpolygraph.co.za\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=52"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}