2.5. Statistical Analysis
Pre-treatment, post-treatment, and follow-up (3 months) variables were analysed and described. To evaluate the effectiveness of the intervention protocol, two complementary strategies were used. On the one hand, the scores of the participants on each instrument before the intervention programme were compared to those obtained after the intervention programme (i.e., pre–post) and three months later (i.e., pre–follow-up). For this purpose, a Wilcoxon W test was applied to each comparison. Likewise, the effect size [