ABSTRACT
This chapter examines the definitions and current developmental models of expertise. It presents the Dualistic Model of Passion (DMP). The chapter proposes a new conceptual model linking passion to the development of expertise. It explores the practical implications of the model and suggests avenues for future research. The model also expands prior models of expertise development, as it takes a lifespan developmental perspective and assumes that expertise, and passion towards an activity, can be developed and maintained at almost any stage in life. The chapter defines the refinement stage of expertise as the point when someone has gained a considerable amount of experience in their area of expertise and the focus is on maintaining, consolidating, and refining such expertise over time. The DMP further posits that there are two types of passion, harmonious and obsessive, that can be distinguished in terms of how the passionate activity has been internalized into one's identity.
