This article critically examines the relations between Lacan’s psychoanalytic theory and more conventional psychological ideas. It does so by concentrating on Lacan’s notion of the ‘mirror stage’. Lacan and some of his followers have suggested that psychoanalytic theory is ‘beyond psychology’. It is argued that Freud believed that psychoanalytic theory was beyond conventional psychology in a synthetic rather than rejectionist way. Lacan cited the work of orthodox psychologists such as Wolfgang Köhler, James Mark Baldwin and Charlotte Bühler as providing evidential (...) basis for his ideas about the mirror stage. The rhetoric of these citations is examined in detail. It is suggested that Lacan makes a distinction between the ‘facts’ of psychology and the interpretation of the facts. However, close rhetorical examination shows inaccuracies in his citations about the behaviour of children and chimpanzees in reaction to mirror images. Moreover, the evidential basis that he cites is neither supported by contemporary psychology, nor, more seriously, did it suggest what Lacan was claiming at the time of his writing. (shrink)