“…Most of the studies conducted to date have been based on the abovementioned models and theories. Some researchers have focused on confirmatory studies (Park, Yang et al 2007, Chen, Kuan 2012) based on existing theories and models, while others have extended TAM (Choi, Totten 2012), UTAUT (Wang, Wang 2010, Jung, Hur et al 2015, and TTF (Shih, Chen 2013) by incorporating various context-specific constructs or integrating these models with theories. Moreover, some studies have investigated the determinants of the main variables of wellestablished theories.…”