In the design of bridge, the designer's subjectivity enters into the form of bridge, willynilly. Accordingly, in this paper, a means giving the objective data in examination of the form is proposed from a standpoint of application of Psychometrical Technique. This technique includes 'Method of Paired Comparisons', 'Method of Rank Order' and 'Method of Successive Categories'. It is thought that
... [Show full abstract] these methods are not limited with the form but also applicable to the color and scene of bridge.