Fig. 4

Wright Map. On the left-hand side the abilities of the participants are plotted as histograms. On the right-hand side the Rasch-Thurstone thresholds for the 19 key exercises (Items) are visualized. Note: The three dimensions (Dim.) were analysed separately. Therefore, it is not possible to compare the difficulties of exercises across dimensions. Colours were used as follows: red for dimension 1, blue for dimension 2 and green for dimension 3