To check the absence of measurement bias error in the sample or Common Method Bias (CMB), the recommendations of Kock (2015), Kock and Lynn (2012) and Podsakoff et al. (2003) have been followed, incorporating into the questionnaire a new latent variable called the CMB variable as dependent on the previous ones of the model, measured with an indicator not previously used. All variance inflation factors (VIF) obtained by this method must be less than 3.3 to confirm that the sample had no measurement bias error (Table 3).