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Original Articles

The Effects of Changes in Direction, Load, and Amplitude of Movement on Gradation of Effort

Pages 207-216 | Published online: 13 Aug 2013
 

Abstract

Gradation of a response is a form of amplification control which determines that the response as a whole is appropriately graded in effort. The present study is an investigation of the effects of changes in resistance to cranking, amplitude of movement, and direction of movement on the gradation of the response in hand cranking. Criteria of gradation were derived from strain gauge and EMG records. A modification in gradation occurred principally when the resistance to movement changed appreciably. The findings are discussed in terms of one basic pattern of organization that is used, despite variations in task conditions.

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