This article examines how problems of validity in empirical social research differ from those in natural science. Specifically, we focus on how some ontological peculiarities of the object of study in social science bear on validity requirements. We consider these issues in experimental validity as well as in test validity because, while both fields hold large intellectual traditions, research tests or questionnaires are less closely connected to natural science methodology than experiments.

Cosmos+Taxis published a special issue with a symposium discussing Robert Vinten's book Wittgenstein and the Social Sciences. The symposium was edited by Richard Eldridge and it contains contributions from Paul Roth (Distinguished Professor, UC Santa Cruz), Daniel Little (Professor, University of Michigan, Dearborn), Rafael Azize (Associate Professor, Federal University of Bahia), Richard Raatzsch (Professor, EBS Universität), and Rupert Read (Associate Professor, UEA) - with a response by Robert Vinten ('Response to Critics'). Within the issue the papers compare Wittgenstein's philosophy to (...) art, compare Wittgenstein to Brecht, and examine the nature of the social sciences. (shrink)