论文对6个假设中的3和5,进行了单因素被试间的协方差分析(A one‐way between‐subject analysis of covariance,ANCOVA)
3.4 Hypotheses 2a and 2b: Did the VR groups have higher pretest-to-posttest changes in intrinsic motivation than the text group?
研究者为了验证两个VR组对学生内在兴趣的提升要显著高于文本组,进行了单因素协方差分析( one-way between-subject analysis of covariance (ANCOVA)),即将前测内在兴趣分数作为协变量( covariate),后测兴趣分数作为因变量(dependent variable),结果显示三组有显著差异(F(2, 100) = 7.249, p = 0.001)。接着进行两两比较,发现immersive VR比文本组要显著高(F(1, 65) = 8.995, p = 0.004),desktop VR 组也要比文本组要显著高(F(1, 68) = 10.919, p = 0.002)。
3.5 Hypotheses 3a and 3b: Did the VR groups have higher pretest-to-posttest changes in self-efficacy than the text group?
研究者做了与3.4相同的数据统计分析。
那么单因素协方差分析检验是什么?有什么特点?