Hi there,

I'm a bit stuck with SPSS - I have conducted an entirely repeated measures experiment, and I now need to control for a covariate.

I've consulted several websites as well as statistics books, nowhere however can I find how to perform this procedure for repeated measures, just between-participants.

In the B-P, you need to test that the assumption of homogeneity of regression slopes is met, however I'm not sure that this is true for RM - or if it's possible.

I know that RM-ANCOVA can be performed! Please could someone who is very good with SPSS give me some advice on how to perform a repeated measures ANCOVA, with some guidance on tests of assumptions, and how to report the result.

Thanks for reading!