Analytic frame is a detailed sketch or outline of some social phenomenon, representing the initial idea of a scientist analyzing this phenomenon. Charles C. Ragin defines it as one of the four building blocks of social research (the other three being ideas (social theories), evidence (data) and images (new ideas synthetised from existing data). Thus, analytic frames are used to elaborate on starting ideas and usually consist of a list of some key elements found in most of the analysed phenomena (for example, social movements).