My suggestion is that you take the weekend lull in readership to now
read the Posting Guide which it appears you nave not yet done. Had you
done so you should have encountered the advice about how to
successfully attach data files. (None came through.) You would also
have read the request that before posting that you search the R-help
archives for previous questions that match yours. (There are several
using the search terms "post-hoc repeated measures":
http://search.r-project.org/cgi-bin/namazu.cgi?query=post-hoc+repeated+measures&max=100&result=normal&sort=score&idxname=functions&idxname=Rhelp08&idxname=Rhelp10&idxname=Rhelp02
--
David.
On Jan 9, 2011, at 7:10 AM, Frodo Jedi wrote:
Dear all,
how can I perform a post hoc analysis for ANOVA with repeated
measures (in
presence of a balanced design)?
I am not able to find a good example over internet in R...is there
among you
someone so kind to give
me an hint with a R example please?
For example, the aov result of my analysis says that there is a
statistical
difference between stimuli (there are 7 different stimuli).
...I would like to know which stimuli are involved.
aov1 = aov(response ~ stimulus*condition + Error(subject/
(stimulus*condition)),
data=scrd)
summary(aov1)
Error: subject
Df Sum Sq Mean Sq F value Pr(>F)
Residuals 14 227.57 16.255
Error: subject:stimulus
Df Sum Sq Mean Sq F value Pr(>F)
stimulus 6 11.695 1.94921 2.3009 0.04179 *
Residuals 84 71.162 0.84717
---
Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
Error: subject:condition
Df Sum Sq Mean Sq F value Pr(>F)
condition 1 42.076 42.076 12.403 0.003386 **
Residuals 14 47.495 3.393
---
Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
Error: subject:stimulus:condition
Df Sum Sq Mean Sq F value Pr(>F)
stimulus:condition 6 9.124 1.5206 1.4465 0.2068
Residuals 84 88.305 1.0513
In attachment you find the table I am using, you can access it by
means of:
scrd<-
read.csv(file='/Users/....../tables_for_R/
table_quality_gravel.csv',sep=',',header=T)
The data are from an experiment where participants had to evaluate
on a seven
point likert scale
the realism of some stimuli, which are presented both in condition
"A" and in
condition "AH".
Thanks in advance
Best regards
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD
West Hartford, CT
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
