Summary of the Technology Acceptance Models

The previous discussion of each model has indicated its evolution and documented how the first three models were extended when limitations were identified by research. TRA was extended into TPB which later was extended to DTPB, which plays a middle role in the evolution scenario since it combines TPB and another extension to TRA: TAM (owned by IS)and Rogers’ Diffusion of Innovation (DOI). The other models can be traced to the Psychology discipline, which probably explains the presentation of variables such as social pressure, self-efficacy and affect in the other set of models utilized in the explanation of technology adoption domain. The common determinants among the technology models are illustrated in Table 2

Table 2: Contributing Theories of Technology Accepted Models and Core Constructs