 The first three chapters of The Theory of Behavior (Ribes-Iñesta & López, 1985) describe how individuals talk about psychological events and presents a review of the natural history of several notions used in psychology as to their origins in root metaphors (such as the notions of psyké or mental disorders). The issue of terms, of how scientists talk about psychological events, is significant within Ribes-Iñesta’s approach. In general, Ribes-Iñesta draws attention to the many problems of using terms derived from ordinary language practices, as opposed to the technical language developed by sciences wherein a word has a specific meaning or usage. Ribes-Iñesta next considers the concept of the field, emphasizing its original formulation in physics by the end of the 19th century.2 A field is a system constituted of interdependent elements, where changes in any of the elements transform the entire system, including the relationships among the elements (Kantor, 1958). An explanation of a system involves an analysis and understanding of the interdependent relations occurring among its constitutive elements. There are no explanations coming from outside the system. There is no other system affecting or acting upon it. Readers unfamiliar with field theory, including its use in psychology, should consult Smith (1996).