1 Department of Experimental Psychology, Institute of Psychology, University of Sao Paulo, Professor Mello Moraes Avenue 1721, São Paulo, SP, Brazil. jaroslava@usp.br.
2 Department of Zoology, Faculty of Science, Charles University, Prague, Czech Republic.
3 Department of Experimental Psychology, Institute of Psychology, University of Sao Paulo, Professor Mello Moraes Avenue 1721, São Paulo, SP, Brazil.