A simple question for those who are used to ICC...

What is the difference between the single and the average ICC in ICC
(3,K)? I mean, why does SPSS calculate both the single and the average
when i have four judges (so, ICC(3,4))? Is the single used for test-
retest, meaning that there is only one juge, but it is rating subjects
two or more times?

And average, is it the average correlation between all pairs of juges?
Do any of you know the difference between "Absolute agreement"
and "Consistency" in SPSS? Does this apply to both single and average?


Sorry again for my poor english.

Jean-Pierre


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