1. Department of Computer Science, Institute of Mathematics and Statistics; University of São Paulo; São Paulo Brazil
2. Department of Psychology; Princeton University; Princeton NJ U.S.A.
3. Neuroscience Institute; Princeton University; Princeton NJ U.S.A.
4. Department of Statistics, Institute of Mathematics and Statistics; University of São Paulo; São Paulo Brazil
5. Center of Mathematics, Computation, and Cognition; Universidade Federal do ABC; Santo André Brazil