In this chapter, I present a brief overview of an approach to the explanation of psychological phenomena with which I have long been concerned (Wozniak, 1975, 1981, 1983, 1985, 1987, 1992). This approach was inspired originally by my attempt to make sense of formal characteristics shared by the constructivism of Piaget (Piaget & Inhelder, 1969), the sociohistorical theory of Vygotsky (1956), and the ecological psychology of Gibson (1966, 1979). The perspective that has emerged from this effort is transactional, intersubjective, and constructivist in orientation.