Designing simple and effective expression of robot´s primitive minds to a human

This paper describes designing expression of robot\´s primitive minds in a simple and effective way. Although expression of robot\´s minds like internal states is becoming a major topic in human-robot interaction, few studies to propose a policy to design concrete expression. In this paper, we propose the design policy, called "SE2PM: simple expression to primitive mind", and fully implement expression of robot\´s minds based on the design policy, then investigate the effectiveness of them. SE2PM implies that intuitive and simple expression like a beep sound from a simple robot (e.g. a mobile robot) is more effective than complicated behaviors from a complex robot (e.g. a dog-like pet robot) in informing its primitive minds to a human. Thus, in order to investigate the validation of our SE2PM policy, we implement two robots: a mobile robot based on Mindstorms with mind expression of beep sound, and a pet robot, AIBO, with mind expression of complicated behaviors. We also conduct a psychological experiment with participants to compare the two different expression, and the results eventually support SE2PM policy