Fig. 3

Individual peer review scores for one group (n = 36, group G in the other figures). Reviewers and reviewees are indicated by (the same) Roman and Greek capital letters. Normalized z scores were converted to grey-scale with highest scores in black and lowest scores in white (so, for example, student Ω received many high scores while student A received few). Black circles on a white background indicate missing values as individuals did not score themselves. Average marks on the same scale are presented on the strip to the left of the box for the same 36 students. Red boxes highlight two pairs of students (X-D and X-L) who seem to have given each other lower scores than they ought to, based on how their peers scored them