Strategic Communication, Psycholinguistics, and National Security: NATO and Allied States

Psycholinguistics, the scientific study of how humans produce, interpret, and are influenced by language, has emerged as a critical yet underutilized frontier in national and international security.In an era where hostile actors increasingly weaponize narratives, manipulate discourse, and exploit cognitive vulnerabilities, the ability to systematically analyze language provides NATO and its member states with both defensive and offensive strategic advantages.This paper integrates peer-reviewed research, cross-disciplinary methodological advances, and NATO's evolving security doctrines to propose a comprehensive and ethically grounded framework for the application of psycholinguistics in national security.We examine the current evidence base on linguistic markers of deception, threatening discourse, grievance-driven communication, radicalization pathways, online influence dynamics, and authorship attribution.Each domain is assessed for validity, operational reliability, and limitations, while highlighting emerging machine learning and multimodal approaches that extend beyond traditional linguistic analysis.Building on this foundation, we map operational applications to NATO's Strategic Communications, counter-disinformation initiatives, intelligence analysis, HUMINT and CYBER operations, and the broader cognitive security agenda.A special emphasis is placed on designing scalable analytic pipelines, multilingual adaptation across the Alliance, and red-teamed validation protocols that address adversarial obfuscation.Equally important, we develop a governance model rooted in NATO's Principles of Responsible Use of AI and the European Convention on Human Rights, ensuring proportionality, transparency, and freedom of expression safeguards.By proposing a measurement-driven research agenda with concrete key performance indicators, this paper positions psycholinguistics not as an auxiliary tool but as a strategic multiplier in safeguarding NATO's cognitive domain, strengthening democratic resilience, and anticipating the future of conflict where language and cognition are decisive arenas of competition.