Species repeatability and adjusted repeatability of feather mite prevalence.

<p>Species repeatability (R; white circles) and adjusted repeatability (R_adj; black circles) for feather mite prevalence with corresponding 95% confidence interval estimates for different intensity data subsets (either the entire dataset, “All observers”, or for data from seven different researchers separately). The following confounding effects were retained in the models: “breeding” was retained for observers 1–7; "habitat" was also retained for observers 2, 5 and 6; the “PC1” was also added for observers 1 and 4; finally, six variables of the spatial autocorrelation term were retained for observer 4. For “All Observers” the final model included the fixed effects shown in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0107341#pone-0107341-t001" target="_blank">Table 1</a>. All R and R_adj estimates were statistically significant at α = 0.001. 95% CI could not be calculated for R_adj (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0107341#s2" target="_blank">Methods</a>).