在进行被试内设计实验后,如果实验前后有多于两组数据,那么在数据分析时我们需要运用重复测量方差分析的统计手段。与独立组ANOVA相比,不同点在于SS组内可以进一步分解为SS被试间+SS误差。通过比较Fobs与Fcrit的大小,可以判断实验前后有无显著差别。如果有显著差别,可以进一步进行事后检验,并计算效应。
After conducting the subject design experiment, if there are more than two sets of data before and after the experiment, we need to use the statistical method of repeated measures analysis of variance in data analysis. Compared with the independent group ANOVA, the difference is that within the SS group, it can be further decomposed into SS inter subject+SS error. By comparing the size of Fobs and Fcrit, it is possible to determine whether there is a significant difference before and after the experiment. If there is a significant difference, further post hoc testing can be conducted and the effect can be calculated.