William Lyons presents an original thesis on introspection as self-interpretation in terms of a culturally influenced model. His work rests on a lucid, careful, and critical examination of the transformations that have occurred over the past century in the concepts and models of introspection in philosophy and psychology. He reviews the history of introspection in the work of Wundt, Boring, and William James, and reactions to it by behaviorists Watson, Lashley, Ryle, and Skinner.