Abstract
The study investigates the effect of the division ranks of the sensory evaluation scale on the evaluation of grasping of cylindrical object. The evaluation tests were performed using the division ranks of 2-7 and the paired comparison method. The optimum diameter for grasping pipe evaluated by the sensory evaluation method with using several division ranks of answer were almost agree with that the paired comparison method. Furthermore, the optimum grasping diameter evaluate were decreased with increasing the number of division rank and up to 4 ranks. Therefore, the 4 or more division ranks of answer was high accuracy of the sensory evaluation than the 2 or the 3 division answer.
