空手道の試合における顔面予防具装着の判定に及ぼす影響

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Summary In order to study the extent of the effect on the judgement of refree's in the case of Karate competitions in which the participants wear protective face masks and in the case of those in which they do not, experimental tests were carried out among referees and ordinary people to measure their movement vision and instantaneous vision capability. The results are as follows:1) The rate of correct judgement with respect to instantaneous vision was extremely high (approximately 100%) in Case 0 (no fist) regardless of whether a protective mask was worn or not.2) In Case 1 (violation) and Case 2 (violation), judging was relatively simple, and the correct judgement rate was over 90% regardless of whether a protective mask was worn or not.3) In the case of a Waza-ari decision involving a few seconds (10 cm), the degree of correct judgement when a protective mask was worn was 75%, which was 16% below that when a mask not worn. This difference is significant.4) In situations 4 (15 cm) and 5 (20 cm), many mistakes were made and the rates of correct judgement were low.5) In situations 0-5, significant differences were noted; the results were approximately 6% worse when protective masks were worn.6) Instantaneous vision tests conducted on five referee's and five ordinary people in the same age bracket produced a 90.7% correct judgement rate for referee's and 84.6% for ordinary people. There was a significant difference between the two groups.7) It was found that the smaller the rate of decline in movement vision, the higher the judgement score tended to be in the case of instantaneous vision.From the above all our experimental results, we are thinking that referee's judgement ability is very important, so it seems to be necessary to study how to appraise the technique of referee's judgement.
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空手道の試合における顔面予防具装着の判定に及ぼす影響

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