Arguments are articulated with the use of key concepts. Indeed, the argument of a study is inseparable from its key concepts since the latter are the linguistic tools with which an argument is formulated. Any study of democracy, for example, must wrestle with the problem of how to define this key term – which will guide our discussion in this chapter.
Concepts, in turn, receive empirical meaning through the indicators chosen to measure them. Any study of democracy must be concerned not only with how to define democracy but also with how to operationalize (measure) this abstract concept.
Conceptualization and measurement are thus closely linked. This is why we have chosen to present them together in this chapter, which begins with concept formation and proceeds to measurement.
Concepts
The key concepts of social science are never fixed and, regrettably, not always clear. Many abstract concepts – such as democracy or social capital – are employed in a variety of ways and thus mean different things in different contexts. This is true even of more specific concepts such as worker-training programs. (Does a one-day program focusing on advice for job-hunting qualify? How about a person who enlists government support to take classes at a community college, or an apprenticeship program?)
The persistent ambiguity of key concepts makes it difficult for the reader, who may struggle to figure out what a term means in a given context and how it connects with other work (using the same or similar terms). It also makes it difficult for writers, who must identify which of several terms they should adopt in their own work and how they should define the chosen term.
Sometimes, the task of forming concepts seems highly arbitrary. And this, in turn, may prompt readers to adopt a skeptical attitude toward the subject. At the same time, the choice of concepts is never entirely arbitrary. Some choices are usually better than others, and a few are patently absurd.
In this spirit, we offer the following criteria, intended to guide the process of concept formation in the social sciences. A good concept, we shall argue, is resonant, internally coherent, externally differentiated, theoretically useful, and consistent in meaning, as summarized in Table 3.1.