This text corresponds to a talk made by Sakharov on 1 January 1928 in a Pedological Congress in Moscow, focusing particularly on the methodological procedures of ontogenetic development of concepts. In the first two parts, Sakharov criticizes methods for researching concepts, focusing on the definitions and abstraction methods. In the third, the author analyzes a search method by Narziss Ach, considering it as a source of application of functional method of double stimulation to study the formation of concepts, drawn by the author under the leadership of LS Vygotsky and presented into fourth part. Notes published in English translation by René van der Veer are also translated. The text is a classic of cultural-historical psychology, published for the first time in Portuguese in a translation from the English, compared with a Russian version.
functional method of double stimulation; concept formation; method of Sakharov; cultural-historical psychology; Sakharov; Leonid Solomonovich (1900-1928)