Extending the technology acceptance model with task-technology fit constructs

During the past decade, two signi®cant models of information technology (IT) utilization behavior have emerged in the MIS literature. These two models, the technology acceptance model (TAM) and the task±technology ®t model (TTF), provide a much needed theoretical basis for exploring the factors that explain software utilization and its link with user performance. These models offer different, though overlapping perspectives on utilization behavior. TAM focuses on attitudes toward using a particular IT which users develop based on perceived usefulness and ease of use of the IT. TTF focuses on the match between user task needs and the available functionality of the IT. While each of these models offers signi®cant explanatory power, a model that integrates constructs from both may offer a signi®cant improvement over either model alone. We discuss the theoretical foundation of both these models and present a theoretical rationale for an integrated model. The result is an extension of TAM to include TTF constructs. We test our integrated IT utilization model using path analysis. Our integrated model provides more explanatory power than either model alone. Research using the integrated model should lead to a better understanding of choices about using IT. # 1999 Elsevier Science B.V. All rights reserved.