CHAPTER 8 208 Overall, all 10 hypotheses on longitudinal validity were accepted (see table 1). Longitudinal reproducibility The intraclass correlation coefficients (ICCs) of the Stage 1 PRPP-M and the Phase 2 PRPP-S and quadrant score are presented in table 3, giving an acceptable reproducibility for the PRPP-M. The reproducibility for PRPP-S and the quadrant score did not reach 0.6. These outcomes resulted in acceptance of Hypothesis 11 but refusal of Hypotheses 12 and 13 (see table 1). Interpretability Of the nine activities, eight activities made a clinically relevant improvement on the parent-rated COPM-P and all improved on the PRPP-M. The one activity that did not make a clinically relevant change on the parent-rated COPM-P also did not change on the PRPP-M. These outcomes resulted in acceptance of Hypotheses 14 and 15 (see table 1). Figure 4 The Perceive, Recall, Plan and Perform (PRPP)-Assessment sum scores (PRPP-S) pre- and post-intervention
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