[R] need help on ICC for a questionnaire

From: Smita Pakhale <spakhale_at_yahoo.com>
Date: Thu, 01 May 2008 09:07:26 -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 read the psy package, 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?

Please help.
Dr. Smita Pakhale

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