>>804
DF=rbind(
c(0,0.05,0.1,0.15),
c(0,0,0.05,0.05),
c(0.15,0.1,0.05,0.1),
c(0,0.05,0.2,0.05),
c(0.1,0.15,0.1,0.05),
c(0.15,0.05,0.1,0.05),
c(0.0001,0.0001,0.0001,0.0001))

とダミーに0.0001を加えても
> DF2ICC1(DF)
ICC(1,1) ICC(1,k)
0.2462707 0.5665262

> psych::ICC(DF)
type ICC F df1 df2 p lower bound
Single_raters_absolute ICC1 0.25 2.3 6 21 0.072 -0.027
Single_random_raters ICC2 0.25 2.3 6 18 0.079 -0.028
Single_fixed_raters ICC3 0.25 2.3 6 18 0.079 -0.034
Average_raters_absolute ICC1k 0.57 2.3 6 21 0.072 -0.115
Average_random_raters ICC2k 0.57 2.3 6 18 0.079 -0.122
Average_fixed_raters ICC3k 0.57 2.3 6 18 0.079 -0.154

となるから、高値データでなくてもいいみたい。