The participants were divided into five groups: normals, deuteranomals, deuteranopes, protanomals, and protanopes.
Figure 4 is a more detailed analysis in which the deuteranomals and protanomals are divided into mild, moderate, and severe subgroups.
Post hoc analysis for R signals shows that normals have significantly shorter response times than do all color-deficient groups except for protanomals, and that protanomals have significantly shorter reaction times than do deuteranopes.
The differences are statistically significant, except for normal participants between G and Y signals, for deuteranomals between G and Y signals, for deuteranopes between R and Y signals, for protanomals for Y signals with both R and G signals, and for protanopes for Y signals with both R and G signals.
The mild and moderate protanomals performed a little worse than the normals.
Figure 6 shows a more detailed analysis, in which both the deuteranomals and protanomals are divided into mild, moderate, and severe subgroups.