Figure 2
From: Normal colour perception in developmental prosopagnosia

Shift function analysis on accuracy data of the Ishihara Test. Shift function plots the quantile differences of two groups as a function of the quantiles of one group. (A) Kernel density estimates. Group deciles are marked by vertical lines. (B) Shift function. The x-axis shows the deciles for DP and the y-axis shows the difference in deciles between DP and control group (DP deciles–control deciles). The vertical lines show 95% bootstrap confidence interval.