REVIEW article
Front. Hum. Neurosci.
Sec. Brain Imaging and Stimulation
This article is part of the Research TopicReviews and insights in brain imaging and stimulationView all articles
Exploring the N-back Task: Insights, Applications, and Future Directions
Provisionally accepted
- 1Zhuhai College of Science and Technology, Zhuhai, China
- 2Shantou University, Shantou, China
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The n-back task has become a central paradigm for investigating the mechanisms of working memory (WM) and related executive functions. This review provides an integrative analysis of the n-back experiment, covering its cognitive operations, task variants, neuroimaging findings, and practical applications across multiple domains. We first delineate three core cognitive components— updating, maintenance, and attentional control—and summarize converging evidence that these functions rely on overlapping fronto-striatal and fronto-parietal networks. We then examine major task variants and review applications in: (1) cognitive training and transfer effects, particularly the proposed association between WM and fluid intelligence; (2) clinical contexts including attention deficit hyperactivity disorder (ADHD), depression, and neurological rehabilitation; (3) developmental and educational settings; and (4) emerging research on social cognition, stress, and emotional regulation. Critically, this review evaluates ongoing inconsistencies in how the n-back task is interpreted as a measure of WM and highlights methodological factors, such as task heterogeneity, multi-process interference, and mental fatigue, that complicate both behavioral and neural inferences. To address these issues, we outline methodological recommendations including adaptive task design, multimodal physiological monitoring, and standardized experimental protocols. We further discuss future directions involving virtual reality (VR), mobile platforms, and brain–computer interface (BCI) integration to improve ecological validity and translational relevance. By synthesizing behavioral and neural evidence, this review underscores the n-back task's versatility while emphasizing the need for improved construct clarity and methodological rigor.
Keywords: n-back task1, Working memory2, fluid intelligence3, multi-cognitive process4, mentalfatigue5
Received: 09 Oct 2025; Accepted: 19 Nov 2025.
Copyright: © 2025 Huang, Chen, Mo, Zhao and XU. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Tao XU, wanxiao0756@gmail.com
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