Canonical correlation analyses summary table for the three constructed indices: component loadings and weights per item, Crohnbach’s alpha per subscale and canonical correlation per index.

Analyses were performed with SPSS OVERALS module. OVERALS calculates a.o. component loadings, weights and eigenvalues. a bComponent loadings in OVERALS are similar to factor loadings in a factor analysis. Weights are similar to standardised regression coefficients [9], [12]. cThe canonical correlation is calculated with the formula: rd = ((K x Ed)–1)/(K–1), whereby K = number of sets, d = factor number (in this case only one factor was calculated), and E = the eigenvalue of the factor/index. dSCP index: canonical correlation = 0.38 [10].