This article presents a theoretical framework of how people explain behavior. The framework, based on the folk concept of intentionality, distinguishes two major modes of explanation-reason explanation and cause explanation-as well as two minor modes and identifies conditions under which they occur. Three studies provide empirical support for these distinctions. As part of the framework, a detailed model of people's reason explanations is developed, which emphasizes the unique conceptual and linguistic features of reasons. This model points to limitations of traditional attribution concepts, which are examined theoretically and empirically. Finally, the theoretical framework incorporates attribution concepts, which apply to some but not all modes of explanation. Several paths for future research are outlined-on novel topics such as the roles of rationality and subjectivity in explanations and on classic topics such as the actor-observer asymmetry and the self-serving bias.
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