This book revisits psychology's appropriation of natural scientific methods. The author argues that, in order to overcome ongoing methodological debates in psychology, it is necessary to confront the problem of formalisation contained in the appropriation of methods of natural science. By doing so, the subject matter of psychology – the human being – and questions about the meaning of human existence can be brought to the centre of the discipline. Drawing on Garfinkel, Sacks, Edwards and Potter, the author sees ethnomethodologically informed qualitative methods, which stem from phenomenology, as a possible alternative to statistical methods, but ultimately finds these methods to be just another method of formalisation.She returns to Husserlian phenomenology as a way to critique the centrality of method in psychology and shows that the adoption of natural scientific methods in psychology is part of the larger push to formalise and objectify all aspects of human existence.