重庆市近年体育高考400m专项评分标准的完善研究

Research on the Improvement of the 400m Special Scoring Standard of the College Entrance Examination of Physical Education in Chongqing in Recent Years

本文通过数理统计法,对重庆市2016—2018年体育高考400m专项考生成绩做研究分析,进行正态性检验、难度和区分度等统计分析。研究结果表明:现行标准能够较好贴合"水平愈高时,难度也愈大,相应增加的分数也应愈多"原则,但是区间段内依然是等距增加分值,分数分布依然呈现偏态分布,还有偏移程度加重的态势,合计满分比为24.7%,合计不及格率为17.7%,满分比率和不及格比率高,合计考试难度为0.711,考试难度大,区分度为0.492,区分度大的情况。进而对重庆市体育高考400m专项标准做出了修改,从而得出了新的标准Y=1.47D^2+38.46,男生的满分为50.98s,男生及格分为57.40s,女生的满分为59.92s,及格分为67.69s,然后用新的标准对重庆市近3年的体育高考成绩用分数换算后进行检验,结果显示:分数的正态性分布更好,考试难度得以显著改善,评分标准更加科学合理。该研究旨在改进完善重庆市体育高考400m专项的评分标准,让重庆体育高考400m专项评分标准更具有科学性、客观性、公正性,更有利于选拔优秀专业性体育人材。

By means of mathematical statistics,this paper makes a research and analysis on the results of 400m special examinees for college entrance examination of physical education in Chongqing from 2016 to 2018,and carries on the statistical analysis of normality,difficulty and discrimination.The results show that the current standard can better conform to the principle of"the higher the level,the greater the difficulty,and the more scores should be increased accordingly".However,in the interval,the score value is still increased equidistant,and the score distribution still shows a skew distribution,and the skew degree is aggravated.The total full score ratio is 24.7%,and the total failure rate is 17.7%.The full score ratio and the under grid ratio are high,The total difficulty of the test is 0.711,the difficulty of the test is large,the discrimination is 0.492,the discrimination is large.Then,the 400 meter special standard of Chongqing sports college entrance examination is modified,and the new standard Y=1.47D^2+38.46 is obtained,the full score of boys is 50.98 seconds,the passing score of boys is 57.40 seconds,the full score of girls is 59.92 seconds,and the passing score is 67.69 seconds.Then,the new standard is used to test the scores of Chongqing sports college entrance examination in the past three years after conversion.The results show that the scores are normal,the distribution is better,the test difficulty is improved significantly,and the scoring standard is more scientific and reasonable.The purpose of this study is to improve the evaluation standard of 400m in Chongqing sports college entrance examination,so that the evaluation standard of 400m in Chongqing sports college entrance examination is more scientific,objective and fair,and more conducive to the selection of excellent professional sports talents.