@article{oai:ynu.repo.nii.ac.jp:00000539,
 author = {佐藤, 良雄},
 journal = {横浜国立大学教育紀要},
 month = {Mar},
 note = {application/pdf, In elementary school education much regard is paid to the improvement of physical fitness and constitution, and it is focussed especially on coordination. Tne aim of this research is to examine how coordination in children develops and how to evaluate it practically. The method adopted to achieve this aim is first to make the boys and girls who are to be the subjects of the experiment throw a ball with all their might, and then have them try to throw it five times at the mark set at half the distance the ball covers at the first trial; the examiner measures the spaces between the mark and the points where the ball falls. In managing the discrepancy I have made use of the Discrepancy Index, DI=[numerical formula]. D_1 is excluded, because the first ball throwing is too often governed by chance. For the purpose of examining the relations DI bears to physical fitness and constitution panchi cards have been used. The result of this experiment shows that boys' superiority in this respetct to girls can be observed in every form, and that both boys and girls in lower forms have low DI value and make remarkable improvement in the third form. The sixth-form ability is about 67% of that of adults, whom the girls in the same form surpass, boys' grading There can be found nothing noticable in the relations between physical constitution grading ability. The fact that the second-form children show peculiar changes in the proportion of various parts of their arms and hands suggests that they are now at the inflection point of development of these parts which have much to do with ball throwing. Grading ability generally develops much after passing the inflection point. As to physical fitness I have inquired into the relation between DI and measure-value of grip strength which has much bearing on ball throwing, and found that grip strength is closely correlated with full-power ball throwing, but that grading ability is only slightly correlated with grip strength. Grip strength attains remarkable development when children are in the second or third form, so that this period makes its inflection point as is the case eith physical constitution. Grading ability improves much after passing the inflection pointof the development of physical fitness and constitution. Third-form children are in the stage when their self grows rapidly, and their grading ability is greatly affected by their mental operation.},
 pages = {93--100},
 title = {ボール投げ調節能力と体格・体力との関係},
 volume = {9},
 year = {1970}
}