Repeated Measures ANOVA - PROC GLM or PROC MIXED

_maldini_ — Tue, 21 Sep 2021 18:50:11 GMT

I am trying to follow these instructions to perform a Repeated Measures ANOVA. The example is from a book entitled, Design and Analysis by G. Keppel. Pages 414-416.

According to the instructions, "This example contains eight subjects (sub) with one between-subjects IV with two levels (group) and one within-subjects IV with four levels (indicated by position dv1–dv4)."

I don't have access to the book. What does dv1-dv4 refer to? It is the dependent variable at time points 1-4? I'm assuming that's the case, but I'm confused by the reference to it as a "within-subjects" independent variable.

 PROC GLM DATA=wide;
  CLASS group;
  MODEL dv1-dv4 = group / NOUNI ;
  REPEATED trial 4;
RUN;

What is "trial" in the REPEATED statement? Obviously the "4" refers to the 4 time points (i.e., levels).

I am simply preparing for the analysis. I don't have the data yet, so I don't know which format the data will be in (i.e., wide v long).

Also, I'm going to need some help interpreting the output. Any suggested resources would be appreciated.

Thanks!

Re: Repeated Measures ANOVA - PROC GLM or PROC MIXED

jiltao — Tue, 21 Sep 2021 21:51:11 GMT

I highly recommend using PROC MIXED for repeated measures analysis. Here is an example that you might find helpful --

https://go.documentation.sas.com/doc/en/pgmsascdc/v_017/statug/statug_mixed_examples02.htm

Thanks,

Jill

topic Repeated Measures ANOVA - PROC GLM or PROC MIXED in Statistical Procedures

Repeated Measures ANOVA - PROC GLM or PROC MIXED

Re: Repeated Measures ANOVA - PROC GLM or PROC MIXED