I have seen many posts refer to the calculation of the ICC by utilizing the variance of the random intercept and the residual variance from a multilevel model. Does anyone have this formula handy?
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1 Answer
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You can find the formula on the Wikipedia page. It is:
$$
\text{ICC} = \frac{\sigma^2_{\text{intercepts}}}{\sigma^2_\text{intercepts} + \sigma^2_\text{residuals}}
$$
answered Jul 20, 2015 at 17:17