RT info:eu-repo/semantics/article T1 Social Information and Economic Decision-Making in the Ultimatum Game A1 Gaertig, Celia A1 Moser, Anna A1 Alguacil Sánchez, Sonia A1 Ruz, María K1 Ultimatum game K1 Decision-making K1 Social information K1 Uncertainty K1 Psicología K1 Psychology AB The present study tested how social information about the proposer biases responders’choices of accepting or rejecting real monetary offers in a classic ultimatum game (UG)and whether this impact is heightened by the uncertainty of the context. Participants inour study conducted a one-shot UG in which their responses had direct consequenceson how much money they earned. We used trait-valenced words to provide informationabout the proposers’ personal characteristics.The results show higher acceptance rates foroffers preceded by positive words than for those preceded by negative words. In addition,the impact of this information was higher in the uncertain than in the certain context. Thissuggests that when deciding whether or not to take money from someone, people takeinto account what they know about the person they are interacting with. Such non-rationalbias is stronger in an uncertain context. PB Frontiers Media YR 2012 FD 2012 LK http://hdl.handle.net/10259/8158 UL http://hdl.handle.net/10259/8158 LA eng NO Financial support to this research came from the Spanish Ministry of Science and Innovation through a “Ramón y Cajal” research fellowship (RYC-2008-03008) and grants PSI2010-16421 and SEJ2007.63247 to María Ruz. DS Repositorio Institucional de la Universidad de Burgos RD 17-may-2024