Temporal determinants of a kinesthetic aftereffect.

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Abstract
The development of a kinesthetic aftereffect as a function of stimulation times of 15, 30, 45, 60, 75, 90, 105, and 120 sec. and its dissipation after 30 and 90 sec. stimualtion have been investigated in 2 experiments. The task required kinesthetic judgment of the horizontal following controlled rhythmic stimulation of the extended hand across a slanted bar. In experiment I the aftereffect was shown to increase with stimulation time. In Experiment II the size of the aftereffect was similar immediately following 30 and 90 sec. stimulation but the rate of dissipation was greater for the shorter than for the longer stimulation. Since with the method of adjustment dissipation is rapid during the adjustment period, the development function of Experiment I is interpreted as representing a joint function of stimulation time and differential dissipation rates.

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