The present study has its foundation in the behavioral analysis of cognition, whose formulations allow to comprehend number concept as a network of relations among stimuli and/or among stimuli and responses. The performance of six children from three to seven years old and one adolescent with Down's Syndrome was analised in a serie of tasks considered pre-requisites to more complex mathematical learning. For this a computerized version of conditional discrimination procedure was used within a context of matching to sample. The present relations as well as the absent ones and the bad established ones in the subject's repertoires were graphically represented in diagrams that configures itself as individual repertoire's portrait. This resource facilitates the planning of strategical teaching of some relations on purpose to do the emergence of the absent relations and/or to strenghten those relations in which the subject present poor performance, in a way to complete the net. Suggestions of intervention are made.
number concept; stimulus equivalence; network relations; conditional discrimination; computing and education
