Information systems that provide easier access to information and enhanced communication channels to help manage these tasks (e.g. through emails, instant messages, and calls via mobile devices) can cause workers to temporarily lose focus on his or her current activity (defined as interruptions) (O’Conaill and Frohlich, 1995). Even though some research has concentrated on explaining the effects of interruptions (Speier, Valacich, & Vessey, 1999; Gillie and Broadbent, 1989; Cellier & Eyrolle, 1992), they fall short of explaining the complex set of relationships that help us understand how and why an individual attends to new tasks, and how this task fragmentation and taskswitching process influences performance. The purpose of this dissertation is to explain the effect of TMI and taskswitching on performance using the Stimulus Value Role Model (Murstein, 1970) as a theoretical basis and to use working memory to investigate how task-switching and task-fragmentation influence task performance. Controlled laboratory experiments will be conducted to test the hypotheses.