Confidence level of the intervals, 1 - alpha.
Number of raters (columns).
Whether the REML path was used.
Mean square of subjects (REML: k σ²_subject + σ²_e).
Residual mean square (REML: σ²_e).
Mean square of raters (REML: n σ²_rater + σ²_e).
Mean square within subjects, used by ICC1 and ICC1k (REML: σ²_e + σ²_rater).
Number of subjects (rows).
The six forms, in psych's order ICC1, ICC2, ICC3, ICC1k, ICC2k, ICC3k.
R's warnings (aov's essentially perfect fit where the residual mean square is 0 on the ANOVA path).
Result of ICC.