iccCounts - Intraclass Correlation Coefficient for Count Data
Estimates the intraclass correlation coefficient (ICC) for
count data to assess repeatability (intra-methods concordance)
and concordance (between-method concordance). In the
concordance setting, the ICC is equivalent to the concordance
correlation coefficient estimated by variance components. The
ICC is estimated using the estimates from generalized linear
mixed models. The within-subjects distributions considered are:
Poisson; Negative Binomial with additive and proportional
extradispersion; Zero-Inflated Poisson; and Zero-Inflated
Negative Binomial with additive and proportional
extradispersion. The statistical methodology used to estimate
the ICC with count data can be found in Carrasco (2010)
<doi:10.1111/j.1541-0420.2009.01335.x>.