Individuals engage in behaviors to satisfy motivations and can engage in the same behavior to satisfy a variety of different motivations. Previous research has examined how differences in the overall amount of motivation infl uence outcomes but has not addressed how differences in the number of conceptually distinct motivations one has for a particular action infl uence outcomes. In two longitudinal fi eld studies, individuals with more than one motivation for volunteering experienced greater negative outcomes than did those who volunteered to satisfy a single motivation. A laboratory study manipulated the number of motivations individuals had for engaging in a volunteer activity. Individuals with two motivations reported greater negative outcomes than did those with one motivation. The importance of these fi ndings for understanding the linkages of motivation and action in self-regulated behaviors is discussed.Consider the following scenarios: First, consider the situation of a middle-age adult returning to college to earn an undergraduate degree. She is returning to the university to gain skills to advance her career. At the same time, she feels good about herself when she is learning and wants to enhance that feeling, and she is further guided by her belief in the inherent value of educational endeavors. Next, consider a teenager doing volunteer work at a local elementary school. Her guidance counselor suggested that volunteer service would look good on college applications. In addition, it enables her to feel she is giving something back to her community and it gives her an opportunity to spend time with friends who also volunteer.These scenarios share two common themes. First, each person is engaging in an activity to satisfy personal needs and desires. Second, each individual is engaging in the activity in the service of not one but multiple motivations. We will address each of these common themes, beginning with the motivated nature of the activities, because that is the theme that has received the largest share of previous research attention. We will then turn to the second theme, the multiply motivated nature of the activities, which is the focus of this article. Individuals seek to fulfi ll personal motivational needs by selecting and engaging in behaviors that they believe will enable them to satisfy their needs, and the motives guiding individuals in a particular situation play a signifi cant role in organizing their ongoing behavior (Cantor, Authors' Note: This research and the preparation of this article were supported by grants from the National Institute of Mental Health to Mark Snyder and Allen M. Omoto. Marc T. Kiviniemi was supported by a University of Minnesota Doctoral Dissertation Fellowship and by a University of Nebraska-Lincoln Faculty Fellowship during the preparation of this article. The assistance of Stephen A. Asche and A. Lauren Crain in the collection of data for Studies 1 and 2 and of Alyssa Clevinger, Katherine Nelson, and Zachary Remus for Study 3 data collection is gratefully a...