ABSTRACT
The empiricist tradition of Locke, Hume and J.S.Mill and others made no sharp distinction between what would now be called philosophy of mind and psychology. Questions about the justification of mental states such as beliefs tended to be assimilated to questions about their psychological origins. Towards the end of the nineteenth century and beginning of the twentieth, this tendency was fiercely attacked, in particular by Bradley, Frege and (eventually but not at first) by Husserl, usually under the name of PSYCHOLOGISM. The empiricist revival that dominated the first half of the twentieth century accepted and indeed insisted on this distinction between epistemology and psychology, and the difficulty of finding epistemological justifications for various beliefs once psychological substitutes were discounted led to scepticism.
