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This study is part of a stream of research that has a goal of understanding software utilization choices of users by extending and testing TTF models in a variety of domains using various methods of model estimation. In particular, this study extends a TaskTechnology Fit (TTF) model by including the Computer Self-Efficacy (CSE) construct, a strategy of model extension suggested by Berthon et al. (2002). In this study, the domain is the utilization of modeling tools by business students. The TTF models are estimated using PLS. This study finds that CSE, i.e., users' beliefs in their ability to use a technology, in a TTF model increases the explanatory power of the model over one with only task characteristics, technology functionality, and the fit (interaction) between them. CSE has a direct effect on tool utilization, but no significant interaction, i.e., fit, effects.

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