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Interpersonal influence as active coping: effects of task difficulty on cardiovascular reactivity.

This study examined the effects of attempting social influence on cardiovascular reactivity. Subjects were randomly assigned to a noncontingent reward condition or one of three conditions in which receipt of a monetary reward was contingent on their ability to influence another individual through a persuasive communication. In the contingent conditions, the task was presented as either easy, difficult, or very difficult. Measures of systolic blood pressure, diastolic blood pressure, and heart rate were recorded while subjects prepared and delivered the persuasive communication (contingent conditions) or reviewed and read aloud the same statement without an incentive to influence. The contingent conditions produced significantly higher levels of systolic and diastolic blood pressure and heart rate reactivity during preparation and speaking. Further, reactivity was higher in the difficult condition than in the easy and very difficult conditions. The findings are discussed in terms of an interpersonal equivalent of traditional active coping tasks.