A rather different direction in which Kuhn’s thought has been developed proposes that his ideas might be illuminated by advances in cognitive psychology. One the one hand work on conceptual structures can help understand what might be correct in the incommensurability thesis (Nersessian 1987, 2003). Several authors have sought in different ways to emphasize what they take to be the Wittgensteinian element in Kuhn’s thought (for example Kindi 1995, Sharrock and Read 2002). Andersen, Barker, and Chen (1996, 1998, 2006) draw in particular on Kuhn’s version of Wittgenstein’s notion of family resemblance. Kuhn articulates a view according to which the extension of a concept is determined by similarity to a set of exemplary cases rather than by an intension. Andersen, Barker, and Chen argue that Kuhn’s view is supported by the work of Rosch (1972; Rosch and Mervis 1975) on prototypes; furthermore, this approach can be developed in the context of dynamic frames (Barsalou 1992), which can then explain the phenomenon of (semantic) incommensurability.