Most of my research has focused on intrinsic and extrinsic motivation. In so doing, I have studied both the determinants and the consequences of intrinsic and extrinsic motivation. This research has led me to propose a Hierarchical Model of Intrinsic and Extrinsic Motivation (Vallerand, 1997, Advances in Experimental Social Psychology). The Model provides a conceptual framework for organizing and understanding the core mechanisms underlying intrinsic and extrinsic motivational processes as well as lead to novel hypotheses. For instance, it is now possible to study intrinsic and extrinsic motivation from a multidimensional and hierarchical perspective. Finally, the model also serves to bridge the personality and social psychology perspectives of intrinsic and extrinsic motivation.
More recently, I have proposed a Dualistic Model of Passion for activities (Vallerand et al., 2003, JPSP). Research has shown that a large percentage of people have passion for a variety of activities. Such a passion can be either Harmonious or Obsessive. Research in a variety of life domains has shown that Harmonious typically leads to adaptive outcomes and Obsessive passion to less adaptive and even
maladaptive outcomes.