Six kinds of arm covers which contact tightly around the joint regions of the elbow were prepared, and the degree of deformation from each cover and the restrictive pressure on the skin ot the joint were measured and their results were compared with the restrictive psychological feeling, when the arm was strongly bent.
(1) It was found that the deformation and vertical (i. e. restrictive) pressure on the skin were exceedingly greater on the outer part of the ioint, and that the both values were larger in the case of the cover cloths which are stretchable in the longitudinal direction of the arm rather than the case of that in the round direction of the ebow.
(2) Functional tests were applied after Sheffés method of “paired comparison”. Exactness of judgment of the wearers was tested by the “testing of coefficient of consistence” and then the degree of judgment between the wearers was tested by the “testing of coefficient of agreement”. A high correlation was found in each case. Numerical values were obtained by the analysis of variance from the results of judgment.
(3) It was further noted that no linear relation exists between the deformation and the value of psychological feeling and a distinct linear relationship does exist between vertical pressure and the value of psychological feeling.