Timeline for What is the lme4::lmer equivalent of a three-way repeated measures ANOVA?
Current License: CC BY-SA 3.0
14 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 13, 2017 at 12:44 | history | edited | CommunityBot |
replaced http://stats.stackexchange.com/ with https://stats.stackexchange.com/
|
|
| S Nov 6, 2014 at 19:22 | history | bounty ended | Henrik | ||
| S Nov 6, 2014 at 19:22 | history | notice removed | Henrik | ||
| Nov 5, 2014 at 8:28 | history | tweeted | twitter.com/#!/StackStats/status/529913124627820544 | ||
| S Nov 5, 2014 at 8:25 | history | bounty started | Henrik | ||
| S Nov 5, 2014 at 8:25 | history | notice added | Henrik | Reward existing answer | |
| Nov 4, 2014 at 18:41 | vote | accept | Henrik | ||
| Nov 4, 2014 at 18:23 | answer | added | Jake Westfall | timeline score: 21 | |
| Nov 4, 2014 at 1:13 | comment | added | Jake Westfall |
For the three-way problem, the first lmer model that you wrote (which excludes the random two-way interactions) is not expected to be equivalent to a 3-way RM-ANOVA, but the second one that you wrote (which includes the random two-way interactions) should be. As for why there is a discrepancy even with that model, I have a hunch about what the problem is, going to grab dinner then will look at the toy dataset some more.
|
|
| Oct 2, 2014 at 20:07 | comment | added | Henrik |
@RasmusBååth Go Ahead and try to fit it, lmer will complain as the random effects are not identified any more. Initially I also thought that this is the model I want, but it is not. If you compare the lmer model I propose for the 2-way case with the standard ANOVA you will see that the F-values exactly match. As said in the response I linked.
|
|
| Oct 2, 2014 at 20:04 | comment | added | Rasmus Bååth |
Are you sure that you don't want your two level model to be y ~ a*b + (1 + a*b|subject), d[d$c == "1",] ? Or perhaps I'm missing something?
|
|
| Oct 2, 2014 at 19:58 | answer | added | Masato Nakazawa | timeline score: 1 | |
| Oct 2, 2014 at 19:48 | history | edited | gung - Reinstate Monica |
added tag
|
|
| Oct 2, 2014 at 19:37 | history | asked | Henrik | CC BY-SA 3.0 |