Abstract
The association between emotional expression and physiological emotional states is at best, modest. Using data from the autonomic nervous system (ANS), central nervous system (CNS), and hormonal systems there appears to be an association which accounts for approximately 10—20% of the variance between them. Excluding measurement error, it is proposed that the need for action and regulation accounts for the low levels of synchrony. Understanding system responses allows for the study of individual differences as a way of understanding both emotional expressions and states.
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