PSYCHOGALVANIC SKIN RESPONSES Meaning and
Definition
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Psychogalvanic skin responses (also known as electrodermal activity or galvanic skin response) refer to changes in the electrical conductance of the skin that occur as a result of emotional or psychological stimuli. This physiological response is commonly measured by monitoring the activity of sweat glands in the skin, specifically differences in the skin's electrical resistance.
When an individual experiences an emotional or stressful event, the autonomic nervous system is activated and triggers sweat gland activity. This leads to an increase in the skin's moisture content and subsequently alters its electrical conductance. Psychogalvanic skin responses can be recorded by attaching electrodes to the skin's surface and measuring changes in the electrical current that occurs as a result of these changing conductance levels.
Psychogalvanic skin responses are often used as a tool in psychophysiological research and lie detection tests. Changes in skin conductance can provide insights into a person's emotional state, arousal level, or reaction to specific stimuli. For instance, a sudden increase in skin conductance may indicate fear, anxiety, or excitement, while a decrease may signal relaxation or disinterest.
Although psychogalvanic skin responses can be helpful in understanding emotional and physiological reactions, it is important to note that they do not offer a direct measure of the specific emotion being experienced. Instead, they serve as an indication of autonomic activity and can be used in conjunction with other measures to gather a more comprehensive understanding of an individual's psychological state.
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