The measurement models were validated and tested for reliability before adding them to the structural equation model. The structural equation model is shown as a path diagram in Figure 2. In this model, EPT usage is treated as the exogenous variable (ξ1). The endogenous variables include PPR (η1) and PP (η2). Exogenous latent variables (i.e. independent variables, X‐variables) cause fluctuations in the values of other latent variables in the model. Changes in the values of exogenous variables are not explained by the model. Endogenous latent variables (i.e. dependent variables, Y‐variables) are affected by the exogenous variables in the model, either directly or indirectly.