Figure 2: Means±SEM of all ratings per rater and the corresponding means of ratings by the observers (only the respective median of the three observers was taken into account). The distance from the diagonal indicates the degree of inconsistency between raters and observers, hence, the lack of accuracy. Thus, the trained raters were not more accurate but less lenient than the untrained raters. For the grading code see table 1; 1=excellent, 2=good; 3=satisfactory.