Category Definition
Category refers to a logical class or conceptual set used to group phenomena. In the context of sociology, categorisation is a fundamental method through which sociologists attempt to structure and understand the complex social world. Conceptually, it involves establishing divisions based on shared features, allowing for the systematic organisation of observations and data.
Philosophical Origins
The concept has deep roots in philosophy, where it denotes a fundamental class or kind, exemplified by Aristotle’s classification of the ten classes of all modes of being. Historically, related terms, such as rants a priori modes of understanding (e.g., causality or substance), were believed to shape all human perceptions of reality.
Application in Measurement
In empirical measurement, categorisation is essential for processing data. A key aspect of the measurement process involves placing individual observations or measurements into defined groups based on unequivocally shared characteristics. Consequently, a category represents a homogeneous grouping of data. For instance, a variable such as ‘sex’ might be divided into the categories male and female, while ‘social class’ might involve groupings such as upper, middle, and working classes. The rules for assigning observations to these categories vary in complexity depending on the underlying theoretical framework being employed.

