Objectivity and Subjectivity Science and technologies have been developed through objectivism. Because of this, people can share and use their scientific and technological knowledge in common. When we design machines, we need to use such objective knowledge. A machine which has high value evaluated in terms of objective measures such as speed, accuracy, and cost is useful as a tool for human beings, especially for automation. A machine that interacts with a human is not always evaluated by such objective measures.
People evaluate a machine subjectively.
Even if some machines were useless in terms of objective evaluation, some people put high subjective value on them. Such machines could be considered as aesthetic objects. When we design robots that interact with human beings, we have to consider how people think of the robots subjectively. This paper deals with pet robots to investigate subjectivity for designing robots friendly to human beings. There is an enormous number of studies on emotions.