JP wrote:
> I have been unable to find an adequate explanation of exactly what is the
> difference between an interclass and in intraclass correlation, and the
> circumstances in which you would choose either.
> Ian Kestin
This is in answer to the second half of your question: Use the interclass
when you are correlating two different things, such as height and weight. You
can go through the entire data set of paired scores and it is obvious which
number in each pair is a height (call it A) and which is a weight (B).
Intraclass correlations are used when there you cannot do this. They are used
(as one example) to get correlations for twins. If you had a set of IQ scores
from twins, each pair of IQ scores is from a twin pair - but there is no
basis for assigning one A and the other B. Each member of a twin duo could as
easily be thrown into column A as column B.
--
------------------------------------------------------------------
John W. Kulig [EMAIL PROTECTED]
Department of Psychology http://oz.plymouth.edu/~kulig
Plymouth State College tel: (603) 535-2468
Plymouth NH USA 03264 fax: (603) 535-2412
------------------------------------------------------------------
"Kane to kal� ke r�chto sto yal�."
(Do a good deed and cast it to the sea)
Ancient Greek saying
------------------------------------------------------------------
.
.
=================================================================
Instructions for joining and leaving this list, remarks about the
problem of INAPPROPRIATE MESSAGES, and archives are available at:
. http://jse.stat.ncsu.edu/ .
=================================================================
