Fig. 1
Box-and-whisker plot of examiner and peer marks for group U (peer marks were ungraded) and group M (peer marks were graded). The plot shows the median (inside bar), the mean (cross), the first and the third quartiles (bottom and top of the box), and the minimum and maximum (end of whiskers)
Fig. 2
Bland-Altman plot of peer minus examiner marks against mean of peer and examiner marks for group U students (dark grey) and group M students (light grey). Solid lines, means; dashed lines, means ± SD
Fig. 3
Scatterplot of examiner and student marks for group U students (dark grey) and group M students (light grey). Dotted line, line of equality (if there were total agreement between marks); solid lines, regression line. Regression function and correlation coefficient for the mark of both groups are shown
