Despite considerable research on the impact of past behavior on decision making over the past two decades, little is yet known about how past experience moderates decision theoretic factors within models of behavioral intent. This research explores the implications of past behavior within the theory of planned behavior (TPB), and how it influences key decision-making variables. A theoretical model of how past behavior can induce deliberative versus heuristic processing of information is developed and tested. Consumer implications of the impact of past behavior on behavioral intentions are discussed, highlighting the importance of addressing one's experience when making a decision. © 2008 Wiley Periodicals, Inc.