Motor-output variability: a theory for the accuracy of rapid motor acts.

摘要: Theoretical accounts of the speed-accuracy trade-off in rapid movement have usually focused on within-moveme nt error detection and correction, consistently ignored possibility that motor-output variability might be predictably related to amplitude time. This article presents a theory for relationship among amplitude, time, mass moved, resulting error. Predictions are derived from physical principles; empirical evidence supporting principles is presented three paradigms (single-aiming responses, reciprocal movements, rapid-timing tasks); data discussed terms past theoretical future research directions. Examining current level understanding about production control motor many would no doubt tempted say we not come very far since early writings Woodworth (1899) Hollingworth (1909). These writers were concerned with basic laws limb movements (analogous, perhaps motion cornerstone physics) denned between simplest aspects