The Psychological stress evaluator (P.S.E) is a machine detecting sign of stress in the voice. It was tested using tape recording of negotiators during a prolonged terrorist siege, which issued several death threats. The study aimed that test whether the psychological stress evaluator (P.S.E) could distinguish between the traces of terrorist voices before the death threats from the voice traces at the other points. As a psychological stress evaluator, a scoring system uses the proportion of voice oscillations falling above defined amplitude levels (P.S.E). Scores did rise significantly more just before the actual – shooting of a hostage. Unfortunately, the apparatus proved to be cumbersome in practice and of limited or no use during incidents similar to the one analyzed.
Psychological Stress Evaluation
The Psychological stress evaluation is a test of the effectiveness of the psychological stress evaluator (P.S.E), which claims to detect the sign of emotional stress in the human voice. Detecting deception shows the Psychological Stree Evaluation (P.S.E) to be unreliable.
The Psychological stress evaluation (P.S.E) is to analyze audio tape recordings and, according to the manufacturer, to detect available frequency modulations in the 8-12 H2 region caused in part by micro-tremors is said to result in greater stability of the vocal frequencies being emitted, which the manufacturer claims are both indicative of the stress and accurately measured by the instrument. In this test, the subjects were six undergraduate students( three males and three females) facing university disciplinary dear. The students were assigned to one of two groups based on their infractions. Three students who were accused of smoking marijuana, who neither confessed nor refused to take the test, composed one group. The second group faced disciplinary actions for other offences but was asked questions pertaining only to an incident of marijuana smoking in a particular classroom.
The Audiotapes were sent to a psychological stress evaluation (P.S.E) analyst. Based on the charts for the six subjects, the analyst made one correct, three incorrect and two inconclusive judgments. Thus the psychological stress evaluation (P.S.E) failed to perform at a level better than chance expectancy. The poor showing of the ( P.S.E) in this study appears to reflect the instrument itself rather than the procedures used to evaluate tabular data, and 18 references are provided.