Factors Influencing the Effect of Bilingualism on Cognitive Control and Cognitive Reserve

Dear Colleagues,

For over three decades, the debate surrounding the bilingual cognitive advantage has been marked by both enthusiasm and controversy, often becoming polarized and sensationalized. The inconsistency in findings has been attributed to methodological limitations, including small and heterogeneous sample comparisons, a reliance on conventional statistical approaches with relaxed alpha thresholds, and cognitive tests being affected by task impurity. This Special Issue seeks to move beyond these limitations by inviting the submission of papers that advance the field through stronger methodological rigor, improved statistical approaches, clearer theoretical frameworks, and greater ecological validity.

We particularly welcome studies that demonstrate methodological excellence, including pre-registered studies, larger and more diverse samples, or well-matched control groups to disentangle bilingualism effects from confounding variables such as socioeconomic status, education, and immigration status. We encourage the use of robust statistical practices, such as Bayesian approaches and other advanced techniques, to strengthen the reliability of findings. Although not mandatory, studies incorporating real-world cognitive tasks, longitudinal designs, or test–retest reliability across multiple tasks are highly encouraged to improve the ecological validity. Theoretical clarity is also essential, with submissions expected to provide explicit definitions of the cognitive domains under investigation and establish clear causal mechanisms linking bilingualism to cognitive benefits.

We invite interdisciplinary, multi-lab, and multi-site collaborations that contribute to a more rigorous and transparent understanding of bilingualism’s impact on cognition. Additionally, we encourage papers proposing common frameworks and best practices to enhance the field’s methodological integrity. Join us in shaping the next generation of bilingualism research—submissions are now open.

Dr. Polly Barr
Guest Editor

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