[R-sig-teaching] Unbalanced factorial designs

[William Revelle]

Ista,


At 8:01 PM -0500 2/27/09, Ista Zahn wrote:
>I see that the email has not gone through because of the attachment.
>The file can be downloaded from
>http://prometheus.scp.rochester.edu/zlab/sites/default/files/InteractionsAndTypesOfSS.pdf
>
>-Ista
>
>On Fri, Feb 27, 2009 at 7:53 PM, Ista Zahn <izahn at psych.rochester.edu> wrote:
>>  Hi everyone,
>>  This is not a very R-specific question, I hope that will be forgiven.
>>  I am the teaching assistant for the graduate level regression course
>>  in the department of clinical and social psychology at my university.
>>  Many of the students are very confused about the issues that arise
>>  when analyzing factorial designs with unequal cell sizes.
>>
>>  I wrote the attached paper in an attempt to clarify these issues for
>>  them. I'm concerned that my attempt to help them understand the issues
>>  may just confuse them more, and I'm also concerned that I have be
>>  mistaken about some of the claims I make in this paper.
>>
>>  If you have time to look it over at let me know if you spot any
>>  problems I would greatly appreciate it.


  From the point view of teaching ANOVA, this is great.  But from the 
point of view of teaching how to use R to do the anova, it would be 
helpful to include the R commands for the doing the various analyses. 
(As well as creating those  lovely tables.)  Nice job.

Bill


>  >
>>  Thank you,
>>  Ista
>>
>
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-- 
William Revelle		http://personality-project.org/revelle.html
Professor			http://personality-project.org/personality.html
Department of Psychology             http://www.wcas.northwestern.edu/psych/
Northwestern University	http://www.northwestern.edu/
Use R for psychology                       http://personality-project.org/r