The international psychotechnical meetings started in 1920 thanks to the initiative of the Swiss psychologist and pedagogue E. Claparède. While the first was mainly a gathering dominated by his own professional network, the meetings would soon turn out to be successfully attracting an increasing number of professionals. The proceedings which have been re-edited by Gundlach (1998) nicely show the increase of topics, participants, supporters and talks. In the first decades the European-Western dominance is very clear, with German, French, Italian and English as main languages. Nevertheless, Carpintero's research on the later Gotheburg conference in 1951 (the 10th IAAP conference) where the Brazilian delegation was the second most numerous group, shows how much had changed. In my talk I will examine the first contributions from Latin America to the psychotechnical conferences and delve into the South-North interactions between speakers from Europe (and, more specifically, Spain) and several Latin American countries.