学绩测验分数分布形态及其应用研究

Research On the Distribution and Its' Application of Achievement Test Score

从分数分布的偏态系数和峰度系数出发,探讨测验分数分布的类型及其内涵,进而研究分数分布形态的应用现状。研究发现:关于学绩测验分数的分布状态,目前存在对偏态分布概念混淆不清、简单否定偏态分布、盲目遵从正态分布等严重的使用误区。研究结论:盲目遵从分数正态分布可能导致教育的失败。在一般的基于合格测验目的的学绩测验中,应该努力避免出现分数的正偏态分布,理性接受合理的负偏态分布。最后对相关研究的发展趋势进行了简要分析。

Began with the Skewness and Kurtosis coefficient of achievement test score,the type and connotation of score distribution,and its＇ present situation for application have been studied. Some error for the concept of skewness,simple negation to skewness and false applications with normal distribution have been found. The study suggests that the excessive apply of normal distribution may lead to the fail of education. The negative skewness of test score can be accepted rationally,and the positive skewness must be prevented for some usual test aimed at qualified standard. Finally,some developments has been investigated on score distribution.