Umeda executed mainly galvanic skin reflex (GSR), respiration recording and anxiety test for the purpose of finding the characteristic on physiological psychology of the men of a stuttering group, and noticed the following differences between the stutterers and the men of a normal group.
GSR which is caused by auditory stimulus did not showed the particular difference between the stutterers and the normals. On the contrary, the difference between the change in GSR in vocal reading and that in silent reading was little among the normals, but was much among the stutterers. About the change in GSR in a fast and accurate vocal reading, there was no much difference among the normals but there was much difference among the stutterers, as compared with in silent reading. In the stutterers, moreover, the variance of a respiration curve was large, and showed a high anxiety in anxiety test.
In short, the author noticed that the stutterers have a tendency to a high anxiety and showed the acceleration of the autonomic nervous system, and that these tendencies are remarkably improved by a psychosomatic treatment for ten days or so.

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From the use of the electroencephalogram on a group of ten stutterers, I found the following results. Of course, the patients selected for study was rery small in comparison to the total number of resident patients, so I think I should not reveal any definite conclusion.
Six with severe stutterout of ten patients, were shown some irregular brain waves, and one case was classified as abnormal epileptic pattern.
The others (four cases) have slight speech disorders, their patterns were little irregular. It was interesting to discover that the severe stutteer, in generally, were shown irregular brain waves, and they were difficult to be correct. Therefore, I assume that some of severe patients have stutter which was accompanied with some organic disorder of brain, and I will con tend that the diagnosis and the treatment of stutterer need not only study of the essence in stuttering, but the electroencephalographic research is necessary, also.

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