%0 Journal Article %T The W¨¹rzburg School today: The three¡ªnow four¡ªworld theory and new psychological research %A John Wettersten %J Theory & Psychology %@ 1461-7447 %D 2019 %R 10.1177/0959354319851562 %X Research in cognitive psychology has been by and large dominated by attempts to explain how psychological processes can be explained as products of biological ones; these processes are presumed to be causal. These theories fail to account for and be integrated with theories of non-causal mental activities. In order to bridge this gap a new theory of mental processes is needed. Karl Popper and John Eccles¡¯s three world theory offers a promising path. According to this view there are biological entities, rational thought processes and ideas¡¯. It is a revision of a view that Popper adopted as a member and student of the W¨¹rzburg School, which held that there are biological entities, causal psychological processes and ideas¡¯. By going back towards the original and redoing it as a four world theory, by adding to it non-causal rational thought processes, the unfortunate widespread influence of associationist psychology and inductivist methods may be overcome and new social aspects of cognitive psychology may be opened %K cognitive psychology %K history %K Popper %K three worlds %K W¨¹rzburg School %U https://journals.sagepub.com/doi/full/10.1177/0959354319851562