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].