1. University of São Paulo; Department of Computer Science, Institute of Mathematics and Statistics; Rua do Matão 1010 - Cidade Universitária, São Paulo - SP 05508-090 Brazil
2. Princeton University; Department of Psychology and Neuroscience Institute; Green Hall NJ 08544, Princeton USA
3. Federal University of ABC; Center of Mathematics, Computation, and Cognition; Rua Santa Adelia, 166, Santo André SP 09210-170, Brazil