We used three criteria to evaluate the adequacy of the data to the PCA technique: the Kaiser-Meyer-Olkin (KMO) test for measure of sampling adequacy, Bartlett's test of sphericity, and the measure of sampling adequacy (MSA)4 (Hair et al., 2009). All these tests suggested that the dependent variables can be reduced using PCA, since the KMO test was 0.501 (i.e. it equals the threshold value recommended), while the Barlett's test of sphericity presented a p-value
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