Abstract
36 undergraduates were randomly divided into three groups: (1) mental rehearsal with a whole model demonstration, (2) mental rehearsal with a progressive part model demonstration, and (3) controls. Each group participated in a 1-wk. swimming program (140 min. a day) and took 3 tests related to vividness of general motor imagery, swimming imagery, and accuracy of the imagined skill. Dependent variables were speed and distance scores for performance of the backstroke. There were no differential effects of the two demonstrations on motor performance and image formation in the acquisition of skill. Some trends were observed, however. Physical practice as well as mental rehearsal increased vividness and accuracy of imaging the swimming stroke. The effect of mental rehearsal on vividness of imaging a skill was somewhat related to vividness of general motor imagery.
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