The aim of this research was to examine the relationship between stuttering and bilingualism to hemispheric asymmetry for the processing and production of language. Although no differences in language lateralization were found, it appears that bilingualism had a greater influence on functional cerebral hemispheric processing than stuttering. A prevailing finding was that bilingualism seems to be able to offset deficits in executive functioning associated with stuttering. Brain reserve and cognitive reserve are thought to have a close interrelationship with the executive control system. Cognitive reserve may have been reflected in the present study, resulting in a bilingual cognitive advantage.
Kornisch, Myriam. (2015). Estimates of Functional Cerebral Hemispheric Differences in Monolingual and Bilingual People Who Stutter. University of Canterbury. http://ir.canterbury.ac.nz/bitstream/10092/10739/1/thesis_fulltext.pdf