See my project. I have taken three tests. First pretest after three months post test and again after three months another test to check the retention work
I think that you can use ANOVA for compare the results of differents tests
Or non-parametric equivalent (for repeated measures =Freidman)
Have you considered whether a parametric test or non parametric test should be used?
Parametric
If you wilk use parametric test then you will can use ANOVA. See Hair et al (2009) - multivariate analysis of data
repeated measure Anova -the appropriate statistical analysis
See my project.Can I use SEM for this project
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