In the past, numerous investigators have attempted to demonstrate differences between the electroencephalograms of normal speakers and stutterers. These studies have utilized both unilateral and bilateral recordings and have used measures of per cent time alpha, isomorphism (defined in terms of similarity of the waveforms of the two hemispheres) and synchronization (defined in terms of phase relationships existing between the waves in the two hemispheres). Some consistencies have been found, but many of the studies still require validation.
Proceedings of the Iowa Academy of Science
©1956 Iowa Academy of Science, Inc.
Correll, Robert E.
"Frequency Analysis of EEGs of Stutterers and Normal Speakers During Photic Stimulation,"
Proceedings of the Iowa Academy of Science, 63(1), 586-590.
Available at: https://scholarworks.uni.edu/pias/vol63/iss1/63