Functional response models for intraclass correlation coefficients

N. Lu, T. Chen, P. Wu, D. Gunzler, H. Zhang, H. He and X.M. Tu

Journal of Applied Statistics, 2014, vol. 41, issue 11, 2539-2556

Abstract: Intraclass correlation coefficients (ICC) are employed in a wide range of behavioral, biomedical, psychosocial, and health care related research for assessing reliability of continuous outcomes. The linear mixed-effects model (LMM) is the most popular approach for inference about the ICC. However, since LMM is a normal distribution-based model and non-normal data are the norm rather than the exception in most studies, its applications to real study data always beg the question of inference validity. In this paper, we propose a distribution-free alternative to provide robust inference based on the functional response models. We illustrate the performance of the new approach using both real and simulated data.

Date: 2014
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DOI: 10.1080/02664763.2014.920780

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