Abstract
The biphasic theory of emotion, according to which emotion is fundamentally organized along the affective dimensions of valence (degree of pleasantness) and arousal (degree of activation), provided the theoretical framework for this study. In young adults, several neurophysiological measures such as heart rate have been shown to covary with either reports of valence and arousal. Despite the central role that basic emotional reactivity plays in adaptation, relatively few studies have examined age differences in this capacity under well-controlled laboratory conditions and on the basis of standardized emotion-evoking stimuli. Results
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