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ANOVA Within and Between Subject
Posted: Sat May 06, 2017 9:59 am
by j3ypi
I'm not quiet sure how to use the function for repeated measures anovas.
I have a 2x2 design with the version of the survey (1 or 2) and the ratio of solving an item before and after a certain explanation of the items depending on which version of the survey someone had.
Now I ran into some difficulties regarding between subject effects. I want to have "Version_Survey" as the between subject factor.
Code: Select all
anovaRM(
data = daten,
rm = list(
list(
label = "Version_Survey",
levels = c(1, 2))),
rmCells = list(
list(
measure = "Literacy_pre",
cell = 1),
list(
measure = "Literacy_post",
cell = 2)),
rmTerms = list(
"Version_Survey"))
Any idea of what I have to add for that? Maybe "bs" or "bsTerms" I thought but wasn't able implement it correctly.
Thanks in advance.
Re: ANOVA Within and Between Subject
Posted: Sat May 06, 2017 11:06 am
by jonathon
hi, the easiest way to get the right syntax is just to fire up jamovi and put it in syntax mode. then you can use the UI, and it will give you the right syntax.
but "bs" should be the correct argument to specify the between subjects factors.
https://www.jamovi.org/jmv/anovarm.html
if you're still stuck, feel free to post your data set here and we'll take a look.
Re: ANOVA Within and Between Subject
Posted: Sat May 06, 2017 11:48 am
by j3ypi
I can't use the jamovi gui because of the error caused by the NAs. I'll look into it later or just wait for the new release with the fix.
Re: ANOVA Within and Between Subject
Posted: Sat May 06, 2017 12:13 pm
by Ravi
It would be something like this:
Code: Select all
rm <- list(
list(
label="Literacy",
levels=c("pre", "post")
))
rmCells <- list(
list(
measure="Literacy_pre",
cell="pre"),
list(
measure="Literacy_post",
cell="post"))
jmv::anovaRM(
data = daten,
rm = rm,
rmCells = rmCells,
rmTerms=list("Literacy"),
bs="Version_Survey",
bsTerms=list("Version_Survey"))
This assumes that you have your data in
wide format. In
rm you define the name of your RM variable + the levels in that variable. With
rmCells you link the columns in your data to the RM levels. Subsequently, you have to define you BS variable in
bs. For now, you also have to define the terms, but in the future it will just assume that you want all the terms if you don't define these.
This is not the easiest syntax mostly because it assumes you have your data in wide format. In the future we want to support long format data which will make the syntax much easier.
Re: ANOVA Within and Between Subject
Posted: Sat May 06, 2017 12:25 pm
by j3ypi
Thanks a lot.
Even if it's not the easiest Syntax, it's still the best way to go in R. The lack of Within Subject ANOVAs in R is one of the few disadvantages compared to SPSS/SAS/Stata. In psychology you have to do them pretty often.
Keep up the good work!
Re: ANOVA Within and Between Subject
Posted: Wed Jul 31, 2024 10:26 am
by Annach
Dear Jamovi users and cerators, anyone has an idea how to solve 'empty cell in between Subjects design...'? That occur when I try to do RM Anova. I don't Think I miss data. All calculations arę fine as long as I insert Just one factor in the 'between subject factors' field. Maybe I need to specife that software should ignore missing data? But how do I do this? I tryed to specify it in relevant column data (=='ignore_missing=1') but it did not help. I'm trying kind of randomly. I'm pretty crappy statistisian ;p
Re: ANOVA Within and Between Subject
Posted: Wed Jul 31, 2024 11:00 pm
by jonathon
hi,
the issue is that there's a combination of `Status zwiazku` and `zamieszkanie groupy` that you have zero observations for.
i'd suggest running a contingency table (Frequencies -> Independent samples) to locate the empty cell. here's an example. you can see that the *combination* of 'female' and 'non-smoking' has zero counts. your data will have a similar problem.
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