Most histories of psychology weave a story around the rise of objective methods of investigation and the decline of subjective introspection. This paper sidesteps such disciplinary stories by describing self-scrutiny as a practice that moved through a variety of cultural, social and technological contexts in early twentieth-century America. Edmund Jacobson's technique of 'progressive relaxation' is offered as a case in point. Jacobson, a Chicago clinician, developed this cure for nervousness out of his earlier research under E. B. Titchener, an experimental (...) psychologist at Cornell University. Like Titchener's method of 'experimental introspection ', progressive relaxation was a laboratory-based activity designed to transform the practitioner's sensibilities through the fastidious repetition of simple tasks. But while experimental psychologists ultimately rejected introspection as the core of their disciplinary project, the American public embraced progressive relaxation as a practical technique for mastering the new conditions of modernity. (shrink)