Re: [R] need help on ICC for a questionnaire

From: Smita Pakhale <spakhale_at_yahoo.com>
Date: Fri, 02 May 2008 08:14:00 -0700 (PDT)


Dear All,
I am trying to get ICC (Intra class correlation coefficient) for a questionnaire. The questionnaire has about 25 questions and was administered to 50 subjects on two occasions. I want to calculate the reproducibility of the questionnaire administered to the same group of subjects on two occasions. I need to calculate reproducibility of each question administered and not a summary/total score. Each question is not always measured on a same scale.

I read the psy and psychometric packages, however, I do not understand
as to how should I organize my data. Each subject has two scores for each question.

Is there any other package I can use for this? I am a R novice, so sorry for very obvious questions...

Please help.
Sincerely,
Dr. Smita

Pakhale_________________________________________________________________________________

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