florazen 若干小学生,根据家庭条件分成3组,现有他们分别在一年级和二年级的数学成绩 我现在不知道应该做mixed ANOVA还是ANCOVA mixed ANOVA: 因变量:数学成绩 自变量:between-subject:家庭条件组(3组) within-subjet:年级(2个年级) ANCOVA: 因变量:二年级的数学成绩 自变量:家庭条件组(3组) 协变量(covariate):一年级的数学成绩 我用spss把两个分析都做了,在ANCOVA分析中发现一年级的数学成绩可以预示(positively predict)二年级的数学成绩,那我是不是就应该用ANCOVA呢 请高人指点,谢谢!
rtist mixed model if preferred, with _student_ as a random effect, and grade, home condition (and possibly their interaction) as fixed effects.