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Results tagged with intraclass-correlation
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user 9162
Intraclass correlation coefficient (ICC) measures how much quantitative values are similar or associated within groups. There exist several versions and alternative formulations of ICC. The correlation is used to assess a dataset clusteredness, agreement among raters and in other settings.
1
vote
Is high ICC essential when using HLM?
Nezlek (2008) on p.857 puts forward a case that
analysts should use multilevel modeling when they have a multilevel data structure – pure and simple. When I am asked for advice regarding whether or n …
15
votes
2
answers
915
views
ICC as expected correlation between two randomly drawn units that are in the same group
In multilevel modelling the intraclass correlation often gets calculated from a random-effects ANOVA
$$ y_{ij} = \gamma_{00} + u_j + e_{ij} $$
where $u_j$ are the level-2 residuals and $e_{ij}$ are th …
6
votes
1
answer
10k
views
What's the difference between concordance correlation and intraclass correlation?
I understand there are various formulae for calculating an intraclass correlation, and various formulae for calculating a concordance correlation. Is there something that all intraclass correlations h …
1
vote
1
answer
932
views
Random Intercept Model: Will including Level 1 predictors necessarily reduce ICC?
Heck et al (2013) describe a process of building multilevel models that makes use of the concept of intraclass correlation (ICC).
They recommend calculating the ICC from a random-effects ANOVA
FIRST …
2
votes
1
answer
300
views
Using a Fixed-Effects ANOVA to help decide whether to conduct a multilevel analysis
Heck et al (2013) write that
Generally, the first step in a multilevel analysis is partitioning the
variance (referred to as $\sigma^2$) in an outcome variable into
its within- and between-gr …