Chapter 3 46 Figure 2: Parallel analysis of the residuals showing the eigen values in relation to those obtained using randomly generated data. Construct validity The Spearman correlation coefficients between RAdMAT-NL subscales and the other adherence measures SIRAS, percentage change on FTSST, self-reported home-based adherence, overall adherence and percentage attendance at scheduled rehabilitation appointments are presented in Table 5. As expected, the RAdMAT-NL subscale Participation was positively associated with all other measures indicative of adherence. Self-reported home-based adherence had a medium positive correlation, all other measures had a large positive correlation with the RAdMAT-NL; demonstrating evidence for construct (convergent) validity.
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