COVID-19 as a Turning Point in Anxiety and Stress Research on Online and Distance Learning: A Two-Decade Bibliometric Mapping Study

The COVID-19 pandemic transformed online and distance learning from a supplementary educational option into a central component of education systems, bringing anxiety, stress, and psychological well-being to the forefront of digital learning research. This study traces the two-decade evolution of research on anxiety and stress in online and distance learning between 2005 and February 2026 and examines the thematic reorientation associated with the COVID-19 period. Bibliometric mapping of 243 Web of Science (WoS) records was used to identify publication trends, intellectual structures, international collaboration patterns, and thematic developments. Piecewise analysis indicated a significant post-2020 break in annual scientific output, with the growth rate increasing nearly eightfold (p = 0.0015). Thematic evolution showed that pre-pandemic studies mainly focused on technology acceptance, computer anxiety, and learner adaptation, whereas pandemic and post-pandemic research shifted toward mental health, psychological well-being, social isolation, technostress, and resilience. China and the United States dominated scientific production, while Australia and Saudi Arabia showed notable mobility in collaboration networks. Overall, the findings suggest that the COVID-19 period was associated with a field-level reorientation toward an interdisciplinary psychosocial agenda for future online education.