Perceived Cost and Intrinsic Motor Variability Modulate the Speed-Accuracy Trade-Off.

ABSTRACT: Fitts' Law describes the speed-accuracy trade-off of human movements, and it is an elegant strategy that compensates for random and uncontrollable noise in the motor system. The control strategy during targeted movements may also take into account the rewards or costs of any outcomes that may occur. The aim of this study was to test the hypothesis that movement time in Fitts' Law emerges not only from the accuracy constraints of the task, but also depends on the perceived cost of error for missing the targets. Subjects were asked to touch targets on an iPad® screen with different costs for missed targets. We manipulated the probability of error by comparing children with dystonia (who are characterized by increased intrinsic motor variability) to typically developing children. The results

SUBMITTER: Bertucco M 

PROVIDER: S-EPMC4598106 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature