Computers and related technologies have become pervasive in the current organizational environment. Most, if not all, organizational activities are dependent on computer-based information systems, and thus effective use of these technologies is a critical factor in reaping productivity gains, improving return on IT investments, and overall organizational performance. While the impacts of computer self-efficacy on computer task-performance are well established (e.g. Johnson and Marakas, 2000; Yi and Davis, 2003) it has not yet been incorporated into the nomological net attempting to explain performance in tasks requiring the use of computer technologies. Given that successful completion of a particular organizational task depends on both technical (e.g. computer-related) and functional (e.g. task-related) abilities (Looney, Valacich, Todd and Morris, 2006), it is important to look beyond performance in computer-only tasks and accordingly position computer self-efficacy as a determinant of performance in a richer task environment. In addition, given that organizational tasks can largely vary on the level of required computer support, it becomes relevant to understand how the effects of computer self-efficacy on task performance fluctuate as the role of the computer becomes more or less prominent.