*3.2. iPEP Psychometric Roperties*

The reliability of the tool has been calculated using Crombach's alpha to determine if it performs stable measurements, obtaining a result of 0.729, which indicates that the questionnaire is reliable. Subsequently, to verify the validity of the construct, the principal component method of Exploratory Factor Analysis has been applied, with varimax orthogonal rotation.

First, to verify that the factors are correlated with each other, Bartlett's Sphericity (*p* < 0.001) and the Kaiser-Meyer-Olkin test (KMO = 0.802) were calculated, in order to know the adequacy of the sample and if appropriate apply the factor analysis. The result indicates a high partial correlation coefficient, which indicates that it is possible to make a comparison between the magnitudes of correlation coefficients observed and those of partial correlation (Table 4).



The Exploratory Factor Analysis (EFA) results in a structure of six factors that explains 50.70 per cent of the construct. The grouping of the variables (see Table 5) is grouped into the following factors:



**Table 5.** Exploratory Factorial Analysis results.
