Retention of relative force in the scaling of a serial force pattern with an attenuated-force tap

Perceptual and Motor Skills
Nobuyuki InuiM Yamanishi

Abstract

The present study was designed to examine the retention of relative force in the scaling of a serial force pattern in a finger-tapping sequence using an attenuated tap. On practice trials, 12 undergraduate students tapped a force plate connected to strain gauges that gave them feedback about the force. On test trials, participants recalled the force pattern (200 gm-200 gm-200 gm-100 gm) and the intertap interval (400 msec.) practiced during the practice period without the feedback (recalled task). Then, they adaptively produced a halved (halved task) or doubled force profile (doubled task) at the fixed intertap interval. Analyses showed that mean peak forces at the first three tap positions of the tapping sequence undershot the expected forces across all tasks. Hence, the ratios of the forces in Serial Positions 1:4, 2:4, and 3:4 were considerably lower than 2.0. This is a contextual effect suggesting that the last attenuated tap affected the first three taps of the tapping sequence. Thus, because the relative force of movements appears to be a weaker invariant feature than sequencing and relative timing for generalized motor program theory of Schmidt and Lee, this finding does not support the relative force for a generalized m...Continue Reading

References

May 1, 1972·Scientific American·P A Merton
Aug 13, 1998·Perceptual and Motor Skills·N InuiA Matsui
Sep 15, 1999·Perceptual and Motor Skills·N InuiM Yamanishi
Nov 7, 2000·Perceptual and Motor Skills·N InuiM Yamanishi
Dec 1, 1986·Journal of Motor Behavior·R B Ivry
Sep 1, 1986·Journal of Motor Behavior·A Semjen, A Garcia-Colere
Mar 1, 1987·Journal of Motor Behavior·K M Newell, M J Carlton

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