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Abstract
Self-efficacy's role in determining perceived and sustained effort during an isometric handgrip task was assessed using a repeated measures experimental design. Moderately active, predominantly Caucasian, participants (male = 33, female = 39, M = 19.18 years, SD = .74) were recruited from the southeastern United States. Participants were randomly assigned to one of three groups: High-efficacy (HE), low-efficacy (LE), or control. Efficacy expectations were manipulated via false performance feedback. During the task participants provided differentiated ratings of perceived effort at 15-s intervals. Effort tolerance was determined by the length of time the participant could maintain the task. Repeated measures (RM) multivariate analysis of variance (MANOVA) indicated the HE group found the task less strenuous and more enjoyable than the LE or control group. Furthermore, the HE group demonstrated greater tolerance of the task than either the LE or control group. These findings imply that self-efficacy has a major role in enhancing performance and physical effort tolerance.