UNDERSTANDING INFORMATION TECHNOLOGY USAGE - A TEST OF COMPETING MODELS

The Technology Acceptance Model and two variations of the Theory of Pl anned Behavior were compared to assess which model best helps to under stand usage of information technology. The models were compared using student data collected from 786 potential users of a computer resource center, Behavior data was based on monitoring 3,780 visits to the res ource center over a 12-week period. Weighted least squares estimation revealed that all three models performed well in terms of fit and were roughly equivalent in terms of their ability to explain behavior. Dec omposing the belief structures in the Theory of Planned Behavior provi ded a moderate increase in the explanation of behavioral intention. Ov erall, the results indicate that the decomposed Theory of Planned Beha vior provides a fuller understanding of behavioral intention by focusi ng on the factors that are likely to influence systems use through the application of both design and implementation strategies.