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Abstract
This essay argues that Rawls's recent constructivist approach waivers between a relativist defense and a more Kantian account which grounds his conception of justice in the idea of an agreement between free and equal moral persons. It is suggested that this ambiguity lies at the center of his attempt to provide a "political not metaphysical" account which is also not "political in the wrong way".

Facilitated communication, a technique that is said to enhance the communicative abilities of individuals with severe language impairments, has engendered much controversy. Biklen and Duchan (1994) and Green and Shane (1994) present two sides of this controversy. Biklen and Duchan argue that from a constructivist's perspective, the primary issue is the underlying cultural presuppositions regarding mental retardation and science rather than the efficacy of facilitated communication. Green and Shane present research evidence challenging the efficacy of facilitated communication within a positivist's framework. We present a brief review of science as viewed through positivists' and constructivists' lenses. Using the framework of social constructivism adopted by Biklen and Duchan, we disagree with them on three points: (a) even though the process of constructing scientific knowledge is strongly affected by human social, emotional, and cognitive processes, it also involves matters of fact that cannot be ignored; (b) social constructivists' accounts of science can be accepted as descriptive without being prescriptive; (c) although we cannot prove that belief systems, including positivism and social constructivism, are true or false in the larger sense, belief systems have differential consequences for technological changes of the type that are valued by persons with severe impairments of communication.

This article reviews recent work in socio-historical technology studies. Four problems, frequently mentioned in critical debates, are discussed—relativism, reflexivity, theory, and practice. The main body of the article is devoted to a discussion of the latter two problems. Requirements for a theory on socio-technical change are proposed, and one concrete example of a conceptual framework that meets these requirements is discussed. The second point of the article is to argue that present (science and) technology studies are now able to break away from a too academic, internalistic perspective and return to the politically relevant "Science, Technology & Society" issues that informed much of this work more than a decade ago.