A behavioral task for exploring dynamics of communication system in dilemma situations

摘要

This research proposes a behavioral task to demonstrate the process of evolution of human communication systems based on the Machiavellian intelligence hypothesis, claiming that human sophisticated social intelligence such as linguistic ability has been formed through behaviors that maximize self-interest in a competitive social situation. The proposed task was designed as a dilemma game involving messaging to establish Machiavellian communication. The game was developed based on experimental semiotics, a method that generates novel artificial language and examines language functions. Through the proposed task, pairs of participants attach meanings to arbitral graphic symbols forming novel communication systems. In case studies using this task, participants modified or ambiguated the communication system by means of a dilemma between sharing and monopolizing rewards. The result suggests that the proposed game causes ambiguation of the communication system that functions equivocally.