Editorial preface to the fourth edition and modified translation -- The text of the Philosophische Untersuchungen -- Philosophische untersuchungen = Philosophical investigations -- Philosophie der psychologie, ein fragment = Philosophy of psychology, a fragment.

New approaches in the design of information technologies for work practices are drawing upon theories from sociology, anthropology, and social philosophy. Under the labels of Computer-Supported Cooperative Work and Participatory Design, work is done to "neturn" to design insights gained in the social study of the use of technological artifacts. Aftera brief introduction of these developments, the article zooms in on those authors for whom "better" technologies refer to hopes for more democratic and more worker-oriented workplaces. How do these approaches (...) conceptualize "humans, " "machines, " and their interrelation in work practices? The conceptual engine which generates the analytical and political power of this approach, I argue, thrives upon the assertion of an ontological difference between the realms of "technology" and "human work. " What are the consequences of such conceptualizations for design? How do different ways of depicting "technology" and "work practice" yield different politics of technology? (shrink)

What is the relationship between persons, animals, and machines? The author first presents a form of argument against any attempt to reduce biology to mechanism. He then runs a parallel argument for psychology and biology. But although he tries to resist reduction, he insists that to bring into being a person or an animal requires no more than the construction of a certain sort of machine, or causal engine, such that certain normative standards can be applied to its behavior If (...) to call an entity a machine is to forego such commitments, then, trivially, no animal or person could be a machine. If the term "machine" implies no more than the presence of a causal engine, natural or artificial, then machines can be, and some are, animals or people. (shrink)

This paper is an empirical inquiry into the nature of human communication and understanding. It is organized into three sections. First, there is an overview of the ethnomethodological critique of mainstream social scientific research methodology and the relevance of this critique to clinical behavioral research. Second, the details of an ethnomethodological study of communication practices in a family with an alingual, deaf-blind child are provided. Third, implications of the case study are presented.