Concepts in psychology can be related to each other in different ways. In this chapter these different relations will be drawn together and a theory considered as a whole. One of the most convenient ways of summarising a theory is to represent it diagrammatically. In this manner, each individual theory or diagram can be seen to be part of a more general theoretical framework or diagrammatic structure which encapsulates all the different possible kinds of theory which could be devised. Summaries of individual theories will be discussed by means of this general theoretical framework, since it provides a way of summarising theories in a consistent, diagrammatic form. Different theories can be compared and it is a useful conceptual tool in that it can act as a guide in theory formulation.
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