PSYC 2400 Lecture Notes - Lecture 4: Dissociative Identity Disorder, Conversion Disorder, Mental Disorder
17 Sep 2016
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Common principle: if lying or guilty feel nervous, anxious less saliva dry mouth. 1917: william marston first person to use physiology to tell truth; looked at blood pressure (if lying blood pressure is more likely to increase) 1921: john larson first time a polygraph was used; it included a reading of respiration, heart rate and skin conductivity (amount of sweat) was used to help solve a murder cases. What is a polygraph exam: combination of interrogation + polygraph where a person is asked a series of yes/no questions or mc questions. Usage: criminal investigations (possible suspects), security pre-employment screening, disclosure tests (for sexual offenders asked questions and can use polygraph to depict if still having sexual thoughts/feelings) new area of research. Not used from normal jobs high security mainly. 2 types of polygraph tests: comparison question test (cqt) & concealed information test (cit: comparison question test.
