Study on the Timirig Control : The Influence of the Visual Functions to the Timing Action

Abstract

Perception of spatial change of the moving object is one of the most important functions on timing action in sports. The moving objects includes balls, the body of the opponent players, and so on. The purpose of this study is to clarify the relationship between the visual perception and timing action to the moving object. The relationship between accommodation of the eyes which is one of the essential visual founctions, and timing error. The results obtained are summarized as follows: 1) It is supposed that a primary factor of accuracy in timing action is in the constancy of accommodative velocity rather than accommodative time, itself. 2) For good timing* it seemed that there is a optimum speed of moving the obejct. The optimum speed was found between 3 and 4 m./sec. 3) It was found that the timing error was the least when the objcet moved to the direction with the angle of 45 degrees.