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These responses are largely activated involuntarily and therefore cannot be easily controlled. Studies in psychology have shown that emotions can elicit several physiological changes that can be directly measured, such as breathing, sweating, blood pressure, heart rate and muscle contractions. Much of this research is guided by the strong traditions of physiological psychology and psychophysiology. For example, changes in emotions when listening to music can be detected through changes in skin conductance and heart rate. Although physiological measures can be used with some success in estimating emotions, it is important to note that the relationship is correlational and not causal.

In fact, it has been shown that emotions elicit physiological responses, but physiological responses can wedding photo editing service also elicit emotions and these are also quite dependent on individual differences. Most measures used to monitor physiological states are based on recordings of electrical signals produced by the brain, heart, muscles and skin. The amount of information that physiological signals can provide is increasing, mainly due to major improvements in the accuracy of the psychophysiological equipment and data analysis techniques used. Wearable sensors mainly record physiological and inertial parameters and the observable parameters in these cases provide valuable information relating to the user's emotional state. In fact.



Emotional states occur spontaneously and are accompanied by certain physiological patterns. These responses are difficult or even impossible for humans to control. External physiological signals Over the last decade, there has been a notable increase in interest in emotion recognition methods based on the analysis of facial expressions, body posture and gestures. The emotion recognition methods based on these analyzes are based on the same hypothesis as physiological signals: even body postures and gestures are involved in the response of emotions and therefore suitable for recognizing them. External physiological signals are detectable through devices such as video camera, microphone and eye tracker regarding eye movement.