One of the earliest facts noted about the "Alpha rhythm" of the human brain was its reaction to visual stimuli. The blocking caused by a disturbance in the visual field has been remarked in much of the literature. Somewhat later the effect of auditory stimuli was noted, but little experimental work has been done on them. Several writers have also suggested that stimuli of a greater intensity seemed to produce blocking in a shorter time. Growing out of these suggestions the present study has a fourfold aim: (1) To compare the latency time of the two types of stimuli. visual and auditory; (2) To compare the perseveration time of the two; (3) To compare the latency time of stimuli of greater intensity with those of less intensity; and (4) To compare the perseveration time of stimuli of different intensities.
Proceedings of the Iowa Academy of Science
©1938 Iowa Academy of Science, Inc.
"Effects of Visual and Auditory Stimuli on the Brain Waves,"
Proceedings of the Iowa Academy of Science, 45(1), 271-273.
Available at: https://scholarworks.uni.edu/pias/vol45/iss1/71