What does a correlation between human responses to different attributes mean?
In order to evaluate the human responses to visual stimulus that change in different attributes such as size, shape and degree of grayscale of objects in the inspection image, a procedure for measuring them is proposed in the paper. By the experiment of paired comparison for dual attributes of objects generated artificially, a correlation between two kinds of attributes is examined on the basis of sensory inspection. From the results, an interesting measure of evaluating the relationship among relevant attributes such as size, shape and density of grayscale of objects was obtained. A hypothesis on correlation among them is also discussed on the meaning of correlation between one attribute and the other attribute of modality.