The perks of being bilingual: Autobiographical memory and aging among bilingual and monolingual Hispanic adults

Objective: Significant gaps remain in our knowledge of cognitive aging in Hispanic adults, the largest and fastest-growing minority group in the United States (U.S.). Episodic autobiographical memory (EAM), which has well documented age-related differences, has not been directly examined in older U.S. Hispanic adults - a population that is commonly bilingual. This study aimed to examine the effects of Spanish-English bilingualism and aging on EAM among Hispanic adults. Methods: In the present study 100 young and middle-aged/older Hispanic adults (50 English-Spanish bilingual Hispanic participants and 50 monolingual English-speaking Hispanic participants) narrated EAMs in a structured interview. We assessed these narratives for episodic and non-episodic details using an established scoring protocol. Results: We replicated the commonly observed age-related decrease in episodic detail generation among Hispanic participants, with non-episodic detail not significantly differing between young and older Hispanic participants. Among young Hispanic participants, bilingualism was associated with higher episodic, but not non-episodic, detail generation. This bilingualism advantage for episodic detail, however, was not evident among older Hispanic participants. Conclusions: These results underscore the complex interplay between bilingualism and age in autobiographical memory for events among Hispanic adults. Our study highlights the importance of including diverse racial/ethnic and linguistic samples in cognitive aging research to better understand how bilingualism and cultural factors influence memory across the lifespan.