The article intends, also, to pay a posthumous homage to Professor Lígia Maria Marcondes Machado, one of the reporters of the Encounter, recently died. Its performance as professor of the Institute of Psychology of USP was exemplary, so much of the academic point of view, as as researcher. It was member's ADUSP, with intense political participation; the solidarity was a fundamental line of its performance. Her contributions to Behavioraf Analysis of the empty space a lot besides the researches that it accomplished and of the goods that it published. She contributed, through the Program of Masters degree, in the competent professionals formation, guided with dedication and good mood.