Objective: Cognitive functioning and bilingualism have been important areas of study over the past decade. The aim of this study was to systematically review the literature addressing the association between cognitive deficits in Mild Cognitive Impairment (MCI) and Alzheimer's disease (AD) and bilingualism. Data Collection: A thorough search of databases was conducted using ProQuest, PsycINFO, and PubMed. Inclusion criteria included peer-reviewed articles only, published 2006 – 2016. A total of ten articles were included in this review. Keywords searched included: cognitive impairment and bilingualism, cognitive functioning and bilingualism. Data Synthesis: Seven out of the ten studies suggested that the active usage of two languages contributes to the delay of cognitive impairment. One study compared bilingual and monolingual individuals and demonstrated that bilingual individuals have a significant difference in the age of onset and progression of symptoms associated to MCI and AD. While monolingual individuals were on average 72 years old,...

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