Functional user requirements generally concern the clinical value/targeted performance, while non-functional requirements mostly concern ease of use, both of which are considered important determinants of usage intention and subsequent usage behaviour [ 13, 14].
Comparing these findings with frequently used IT adoption models such as the Unified Theory of Acceptance and Use of Technology [ 14], the lack of association between system use and professionals' expectancies regarding the system's performance is surprising, as performance expectancy is considered a direct determinant of usage intention and subsequent usage behaviour [ 14].
The model includes users' expectations toward the artifact, perceived social influence and users' roles in the CoP as predictors of artifact use intention and actual usage.
Also new is the extension of TAM2 with the factors "resistance to change" and "compatibility" which allowed additional insight into ED physicians' behavioral intention and actual usage.
Further research is needed in the directionality of HIV and IPV interactions, influence of IPV on fertility intentions and contraceptive usage, potential impact of IPV on HIV disease progression, and ways to reduce IPV risk for women with HIV.
Subsequently, it quantifies the relationship among service properties, perceptual responses and usage intention through the data mining technique using a decision tree.
In addition, the relationship between "perceived ease-of-use" (PEOU) and "usage intention" (ITU) is moderated by the factor "experience" (EXP), whereas TAM2 postulates that with increasing experience the effect of PEOU and ITU will decrease.
The UTAUT framework (Venkatesh, et. al., 2003) draws upon eight theoretic frameworks and assess technology usage using four constructs to predict intention and behavior of technology usage.
An empirical evaluation of PESearch, PEControl, and PEReview revealed that novices felt the most important aspect of the tools for downloading and usage intentions was its usefulness; most experts felt the tool met the design principles as specified.
To mediate the impact of the four main constructs on usage intention and behavior, four factors are posited: gender, age, experience, and voluntariness of use.
