Dear R and statistics experts:
I have data of a behavioral experiment with the aim to investigate the effect
of a memory task on motor learning.
Question:
I would appreciate help in figuring out a possible formula to determine whether
motor learning across sessions differs between 2 groups.
Design:
- 2 Groups: group A: n=10 subjects, group B: n=10
- 6 motor learning sessions: baseline; immediately after memory task; 6h, 24h,
30d later, and 30d later with a different motor task
- dependent variable: response time (RT)
I tried the following:
(lme4 package of R, I assumed that Subject is the random factor, and Session
and Group the fixed factors.)
fm1 <- lmer(RT ~ Session + Group + (1|Subject) + (1|Subject:Session), table)
I would appreciate any help on the formula or the choice of statistical
approach.
Thanks!
Marianne,Columbia SC
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