Message-ID: <CADRwXO+gB-pNQQ=vA8eVSwgDGCV8cAWkLkhHOFVg45chLeckiA@mail.gmail.com>
Date: 2020-05-03T16:18:15Z
From: Shoeayb Qasemi
Subject: MLE for pretest-posttest design
Hi All,
I have data from pre-post design. The necessary assumption of ANCOVA,
homogeniety of slopes, is not satisfied. I tried the following model
as an alternative.
#variables: group(0=control, 1=experimental); time(0=pretest, 1=posttest);
mod1<- lmer(score ~ group*time + (1+time|id), data=dat1)
My questions are:
1. Is the model correctly specified?
2. Which effect tests the effectiveness of treatment?
Thanks in advance,
Shoeayb
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