Acknowledgments: We acknowledge financial support from the Dirección General de Asuntos del Personal Académico (DGAPA) grants IA105017, IA104717, IN113013, IN106215 and IV100116, from the Universidad Nacional Autónoma de México (UNAM) and CONACYT grants 221341 and 167441 to Leonardo Zapata-Fonseca and Tom Froese; and the Marie Curie Intra-European Fellowship “SOCIAL BRAIN” to Bert Timmermans. We thank Charles Lenay and Dominique Aubert from the Institut Technique de Compiègne for making the TACTOS hardware and software available in Cologne, and providing technical support. Leonardo Zapata-Fonseca would like to specially thank Jorge Campos, Leticia Cruz, Jesús Naveja, Juha Lahnakoski, Tore Erdmann and Lilia Fonseca for interesting discussion...