教学评价中"宽容偏向"导致的误差及校正

详细信息

Leniency Bias and Statistical Remedy in Evaluation of Teaching

1.
Institute of Psychology and Behavior, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要: 多分格相关系数及以其为基础的统计能够较好地校正教学评价中的评价者宽容偏向所产生的统计误差。在分析教学评价这样的有序分类数据时,多分格相关被认为比传统皮尔逊相关给出的估计值更为可靠和准确。研究对真实数据的分析也表明,两种方法在分析具有宽容偏向的教学评价数据时,皮尔逊相关的估计值低于多分格相关关系而且验证性因素分析的模型拟合指标证实,基于多分格相关系数的统计方法更适合于这种呈偏态分布的数据。
- 教学评价 /
- 宽容偏向 /
- 多分格相关系数 /
- 皮尔逊相关系数
Abstract: Leniency bias has a detrimental effect to analysis of indicators- relationships in teaching evaluation. It will distort the statistic results based on the Pear son correlation coefficient. The current paper employed polychoric correlation c oefficient to analyze teaching evaluation data, which has been proved robust and will offer more precise estimate. A non-normal real data sample shows that the re is sufficient difference between estimates of two correlation coefficient est imators. The approach based on polychoric correlation offered better fit indexes to a confirmatory factor analysis.
- evaluation of teaching /
- leniency bias /
- polychoric correlation coefficient /
- Pears on correlation coefficient