Reconceptualizing technology use and information system success: Developing and testing a theoretically integrated model

Technology Acceptance Model (TAM) research, which pertains to how an information system can be initially adopted by members of an organization, was born two decades ago and has grown into one of the pivotal theoretical foundations of the information systems (IS) discipline. However, many IS scholars indicate that recent TAM research fails to break the twenty-year-old confinement and provides little intellectual value.;To respond to this call for more intellectual depth in TAM research, this dissertation suggests multiple ways to rejuvenate the research stream. First, Bhattacherjee's IS use continuance model (2001), which is based on the Expectation-Disconfirmation Theory, was adopted as the overall theoretical foundation. Second, the author reconceptualized the most important construct in the TAM model, i.e., perceived usefulness. Third, a technology use model (TUM), which integrate recent studies about IS use, facilitating conditions, and habit, is proposed. Finally, the author further integrated the technology use model with the IS success model. An empirical study, which involves a sample of 311 business professionals, has provided results that validated most of the proposed constructs and models.;This dissertation covers all contributions listed above and is organized into three independent essays. The first essay examines the concept of "usefulness" in IS literature and proposes new constructs to measure various forms of IS usefulness. The focus of the second essay is the development of a comprehensive model to depict an overall picture on technology use after an extended period of implementation. The final essay discusses the IS success research and proposes an integrated IS success model which incorporates a sound theoretical foundation and the latest research developments. All three essays contain empirical results to support the proposed constructs or models. Significant contributions to research and practice for the IS discipline are identified and discussed in each essay as well.