Abstract
Impression evaluation of robot behaviors is important to enhance the effectiveness of robot-assisted therapy. Here, we discuss impression evaluation for mixed walking motion of a quadrupedal animal-type robot, AIBO. To verify the effects of different behaviors on human sensibility evaluation, we performed a comparison between the normal pre-installed gait and an animal-like gait generated by mimicking canine walking, with optimization of the path of the legs using a genetic algorithm and application of a zoological basis. Moreover, we analyzed the relationship between behaviors and impression by evaluating three mixed walking motions.