野球のバッティングにおけるボール情報の有用性

Abstract

We have carried out two experiments on the usefulness when batting in baseball of positional information of the thrown ball over the distance between the point released by the pitcher to the home base. The purpose of the experiments was to determine the point up to which the batter needs to see the ball in order to hit it successfully. All the balls thrown were fast balls. The result of the experiments showed the following : 1. The batter judges whether the ball will be a strike or a ball by the time it reaches the initial one third distance between the release point and the home plate. 2. But he cannot hit the ball successfully when the information on the ball is available only for the initial one third section. 3. The batter needs to see the ball for at least four fifths of the entire distance in order to hit it successfully. 4. The ball information generated immediately before the ball reaches the home plate is not useful for the batter.