Experimental psychology depends on theoretical and methodological foundations. Addressing these foundations is not always trivial and requires a shift in epistemological perspective. Phenomenology can provide a framework that helps to discuss the possibilities and challenges of the discipline. This book provides a historical overview of the phenomenological movement as well as a systematic introduction to the research approaches that are known as 'phenomenological psychology'. The central claim is that the phenomenological discourse can increase the conceptual, descriptive, and methodological rigor in psychology. The purpose of the book is to facilitate the dialogue between phenomenology and cognitive sciences. It is meant to be a guide for interested scholars but also offers new ideas for experts in the field.