UTAUT no relation perception
Perceived usefulness (PU) – This was defined by Fred Davis as "the degree to which a person believes that using a particular system would enhance their job performance". It means whether or not someone perceives that technology to be useful for what they want to do.
Perceived ease-of-use (PEOU) – Davis defined this as "the degree to which a person believes that using a particular system would be free from effort" (Davis 1989). If the technology is easy to use, then the barriers conquered. If it's not easy to use and the interface is complicated, no one has a positive attitude towards it.External variables such as social influence is an important factor to determine the attitude. When these things (TAM) are in place, people will have the attitude and intention to use the technology. However, the perception may change depending on age and gender because everyone is different.
The TAM has been continuously studied and expanded—the two major upgrades being the TAM 2 (Venkatesh & Davis 2000 & Venkatesh 2000) and the unified theory of acceptance and use of technology (or UTAUT, Venkatesh et al. 2003). A TAM 3 has also been proposed in the context of e-commerce with an inclusion of the effects of trust and perceived risk on system use (Venkatesh & Bala 2008).Subjective norm – An individual's perception that other individuals who are important to him/her/them consider if he/she/they could perform a behavior. This was consistent with the theory of reasoned action (TRA).
Voluntariness – This was defined by Venkatesh & Davis as "extent to which potential adopters perceive the adoption decision to be non-mandatory" (Venkatesh & Davis 2000).
Image – This was defined by Moore & Benbasat as "the degree to which use of an innovation perceived to enhance one's status in one's social system" (Moore & Benbasat 1991).
Job relevance – Venkatesh & Davis defined this as personal perspective on the extent to which the target system is suitable for the job (Venkatesh & Davis 2000).
Output quality – Venkatesh & Davis defined this as personal perception of the system's ability to perform specific tasks (Venkatesh & Davis 2000).
Result demonstrability – The production of tangible results will directly influence the system's usefulness (Moore & Benbasat 1991).In an attempt to integrate the main competing user acceptance models, Venkatesh et al. formulated the unified theory of acceptance and use of technology (UTAUT). This model was found to outperform each of the individual models (Adjusted R square of 69 percent) (Venkatesh et al. 2003). UTAUT has been adopted by some recent studies in healthcare.In addition, authors Jun, Yoon, and Lee also think that the technology acceptance model is essential to analyze the factors affecting customers’ behavior towards online food delivery services. It is also a widely adopted theoretical model to demonstrate the acceptance of new technology fields. The foundation of TAM is a series of concepts that clarifies and predicts people’s behaviors with their beliefs, attitudes, and behavioral intention. In TAM, perceived ease of use and perceived usefulness, considered general beliefs, play a more vital role than salient beliefs in attitudes toward utilizing a particular technology.
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