in and related to other theories of (intrinsic) motivation and empirical work on flow and performance. The book provides a review of the current flow research, with a focus on rigorous analysis on methodology. The author takes the time to present methodological aspects in flow research to qualify empirical work. In addition, this volume presents neuropsychological considerations and empirical correlates of flow experiences. The work also describes various theoretical integrations of the different paths being taken within the field of flow research. It presents what has been learned since the beginning of flow research, what is still open, and how the mission to understand and foster flow experience research should continue.