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The technology acceptance model continues to focus on behavioral intention, but with two significant changes that suggest attitude directly influences intention. The first change is that TAM excludes the subjective norm construct included in theory of reasoned action and theory of planned behavior (Ajzen, 1991, Ajzen and Fishbein, 2005). Davis (1989, 2000) suggests that in an organizational setting, individuals may choose to use IT to perform their job, or because their normative referents encourage them to do so. Davis asserts that previous measures of subjective norms are unable to capture the difference between internal motivation and external requirements to comply. The second change is that instead of focusing on general beliefs, TAM includes two new constructs that refer to specific beliefs influencing A toward the intention to use IT. The two new constructs in TAM are:

Intention to use e-commerce is defined as the organization's perception of both affect and cognition to engage in an online exchange relationship with costumers, such as sharing business information, maintaining business relationship and conducting business transaction (Zwass, 1998)

Previous research integrates trust with the model, arguing that trust relate to perceived usefulness and ease of use. Gefen and Straub (2002) also integrate trust, perceived usefulness and perceived ease of use in the context of e-services, Pavlou integrate perceived risk with the TAM model constructs (Pavlou, 2003)

Perceived system risk in e-commerce increase behavioral uncertainty and reduce related trust on e-commerce applications that provide online transactions. However, organizations are likely to go with e-commerce application if their risk perceptions and environmental uncertainties are alleviated so that they control over their usage, therefore, the following hypotheses are proposed:

The higher the system risk in tourism organization towards e-commerce, the less e-commerce is perceived to be useful.

The higher the system risk in tourism organization towards e-commerce, the less e-commerce is perceived to be easy to use.

The higher system risk in tourism organization towards e-commerce, the less it has intention to use e-commerce.

There is an indirect negative relationship between system risk and Intention to Use e-commerce through perceived usefulness.

There is an indirect negative relationship between system risk and Intention to Use e-commerce through perceived ease of use.

HYPOTHESES TESTING

The multiple regression model (Abrams, 1999) was employed to predict the relationship in the construct. Four basic assumptions were met: (1) linearity of the phenomenon measured. (2) Constant variance of the error terms (homoscedasticity). Independence of the error terms, and normality of error term distribution. Before the regression results were accepted as valid, the degree of multicollinearity and its effect on the results was examined. The two-part process (condition indices and the decomposition of the coefficient variance) was employed and comparisons made with the conclusions drawn from t本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。