The aim of this study is to gain an understanding of why employees misuse information systems resources in the workplace. Rather than consider “intention,” as existing behavioral research commonly does, this study investigates actual behavior and employs IS resource misuse as the dependent variable. Data from a web-based survey are analyzed using the partial least squares approach. In light of the dual-process approach and the theory of planned behavior, the findings suggest that IS resource misuse may be both an intentional (...) type of behavior and an unreasoned action. Perceived behavioral control influences employees’ IS resource misuse actions via their desires or intentions, whereas attitude toward such misuse affects these actions via employees’ desires alone. Subjective norm is found not to affect employees’ IS resource misuse via either desires or intentions. In terms of its theoretical contribution, this study considers unethical behavior in information systems by incorporating a dual-process model and the theory of planned behavior. With regard to its managerial significance, the study’s results will help managers to better understand why employees commit IS resource misuse within organizations. (shrink)