Research Trends and Emerging Directions in Non-Pharmacological Interventions for Autism Spectrum Disorder: A Bibliometric Analysis (2001–2025)

Background: Autism Spectrum Disorder (ASD) is a heterogeneous neurodevelopmental condition for which non-pharmacological interventions remain the primary therapeutic approach. Although research output in this field has increased substantially, a comprehensive synthesis of its developmental trajectory and emerging directions is still lacking. Methods: We conducted a bibliometric analysis of publications on non-pharmacological interventions for ASD indexed in the Web of Science Core Collection between 2001 and 2025. Knowledge structures, research hotspots, and temporal trends were visualized and analyzed using CiteSpace. Results: The field has transitioned from an early focus on behavioral interventions in children to a diversified and interdisciplinary research ecosystem spanning the lifespan. Recent growth has been driven by the integration of neuroscience-based approaches, particularly neuromodulation techniques, alongside continued refinement of behavioral, sensorimotor, and complementary therapies. Increasing attention has been paid to individual heterogeneity, methodological rigor, and mechanism-oriented research. Current frontiers emphasize multimodal intervention strategies, neural plasticity-based mechanisms, and the development of personalized precision intervention frameworks. Conclusions: This bibliometric analysis delineates the intellectual evolution of non-pharmacological intervention research for ASD and identifies key research gaps, particularly the need for longitudinal and pragmatic studies targeting individualized treatment response. The findings provide an evidence-informed overview of current concepts and emerging research directions in non-pharmacological care for ASD, with important implications for future clinical research, intervention design, and strategic research planning.