Abstract
The primary goals of this project were to examine whether (1) the impact of emotional state on force control varies as a function of target force level, (2) self reports of emotional state covary with force control, and (3) emotional state and trait levels of depression interact to alter force control. Subjects varying in self-reported depression performed a sustained pinch grip for 20 s at low, moderately low, and moderate target force levels. Each trial began with 8 s of visual feedback, which was replaced with an emotional or neutral image for 12 s. Subjects reported valence and arousal ratings for each image. Across the entire sample, self-reported arousal predicted constant error (CE) during low and moderately low target force trials. Depression significantly predicted the relationship between self-reported valence and CE during moderate target force trials. Theoretical explanations, implications, and future research directions are discussed.
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