a) Feasibility: Missing items (percentage of no-answer): Hip and Knee Questionnaire; a high number of missing items was observed in questions 3, 4 and 5; which present multiple choice of answers for each studied joint (Table 1).
We were not able to find studies focusing on gender differences in the APSD-SR factor structure in mid-adolescent community youth, but in the work of Frick et al. [ 29], among children with a mean age of 10.7 years, less clear differentiation between the interpersonal and behavioral items was observed in girls than in boys, with many items showing double loadings.
Only seven items were present in 50% or more of the observations, whereas eight items were observed in less than 50% of the consultations in the EAP group.
Specifically, in addition to increased group means in all sections of the FRAS, decreased SDs for all statistically significant items were observed in the advanced group results compared with the novice group.
In the case of items S6 and S7, a cross-loading of both the third (0.56 and 0.54, respectively) and the fifth factors (0.52 in both items) was observed.
Regarding unidimensionality, item misfit was observed in 2 of 36 items, but these items showed neither DIF nor scalability problems.
In relation to the intra-rater reliability, good to very good agreement values were found for all scale items, as was observed in the original scale [ 18].
In addition, here, we present data from a retrieval task where activity related to the successful retrieval of the association (relative to retrieval of the items only) was observed in the left perirhinal cortex, the right entorhinal cortex, right hippocampus, and right parahippocampal cortex.
The item on patient's thoughts on origin (item 3) was observed in all consultations in both treatment groups.
Overall, the item hierarchy was found to be consistent and item stability (item parameter invariance) was observed in all four domains across the three time periods.
