-Lie detectors argon designed to detect changes in beneficent activity. They do this by measuring changes in blood pressure, shopping center rate, sweating, and respiration that an individual makes to a question. It is assumed that when a soul is lying there will be an increase in arousal and thus corresponding changes in blood pressure, sum rate, etc. the examiner compares responses to neutral statements. When not swaning on a lie detector machine but instead nervus facialis expressions altogether there could be many reasons that facial expressions alone could be successful or unsuccessful.
Reasons we can rely on facial expressions alone.
* concord to the James-Lange Theory (the first physiological hypothesis) emotion follows upon the material expression (CM). James Theory states that in an emotion-arousing experience, one would first experience muscular responses, and only after these transcend is an emotion experienced. James believed that bodily reactions, like facial expressions, are unconscious, unlearned behaviors (CM).
Now savouring at this theory one could say that we could use facial expressions as lie detectors because your facial muscles would react before you feel the emotion tied to it.
* Reasons we cannot rely on facial expressions as a lie detector
According to another theory, those of Walter Cannon which states that emotions will occur even with come out bodily changes which send messages to the brain are eliminated. Cannon believes emotion occurs at the same time as the facial expression and not because of them as believed by James. This theory would say that: if someone jumped out at you, you would scream and have a scared look on your face at the same time. According to this theory facial expressions would not be reliable because they are not noticeable sometimes and can only be detect at their extremes (CM). Also...If you want to get a full essay, ready it on our website: Ordercustompaper.com
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