The effect upon reaction time of muscular tension induced at various preparatory intervals.

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Abstract
Studies on the optimal warning interval found in reaction time as exp. a function of the response curve of a preparatory muscular set. Tension of controlled intensity and locus was induced at various intervals prior to stimulus presentation. Two series of exptl. observations were made, one with light and one with heavy tension loads induced in the reacting limb, and control observations were taken with only warning interval varied. Tension induced at certain intervals prior to response lowered reaction time significantly. The heavy load condition showed a longer optimal preparatory interval than did the light load condition. The implication of these results for the problem of set-response dynamics is discussed.

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