The study of the adults' thought has some methodological features that hinder the investigation. For the analysis of structures and mental processes of the researchers are reference Epistemology Genetics Clinical-Critical Method, or simply Clinical Method. However, the studies of Piaget and the Geneva School of dealing, mainly in terms of psychogenetic development i.e. the intellectual development from the child. For adults, the clinical method needs some adjustments because they have structures and processes of thinking individuals. In general, the more accurate and quick thinking of adults can lead to the opening of multiple possible levels and countless chances to meet that deductible in tables simultaneously. It is particularly difficult to find a thought that may follow the same time more than one route, and slightly out some hypotheses in favor of others. This article aims to provide opportunities for methodological research that address the specifities of the adult. In particular, we discuss the clinical practice of the method and its nuances in the application subject to greater of 20 years. Given the variety of logical-mathematical operations possible, we highlight the research of the psychological subject and the construction of meaning.
genetic epistemology; psychological subject; cognitive process
