The quality of the aggregation can also be improved by using estimations of the difficulty level of tasks and skills of workers [103].
In order to optimize the logistic patterns of operating theatre, next to accurate day case management, it is mandatory that surgeons planning hysterectomy make adequate estimations of the difficulty of surgery [6, 7, 8].
The ordering based on the item difficulty parameters was in line with the ordering based on the estimation of the items' difficulties by our expert group, and the easy, moderate, and difficult items were included in the final version.
The ordering of the items based on their locations on the latent dimension (i.e., their difficulty; see also Table 2) is in line with the ordering based on the estimation of the items' difficulties by our expert group in the test development process.
The theoretical estimation of the test items' difficulty levels was carried out a priori and therefore independently from the performance test's results.
When a puzzle begins, the player is briefly presented with the puzzle's name, number, and value in "Picarats", the game's system of points as well as an estimation of the puzzle's difficulty.
Confidence intervals provide an idea of the precision of the difficulty parameter estimation.
The finding that perceived difficulties in almost all gait-related physical activities, such as walking, running, hopping, and climbing stairs negatively predicted the performance in the 6MWT may indicate that the estimation of difficulty level is likely to be accurate and may be used to assess the task's real difficulty.
Firstly, the preoperative estimation of level of difficulty was performed with the patient under anaesthesia.
Thus, we considered our sample size (N = 302) adequate for the estimation of difficulty and discrimination of TDE-II items.
