Adult ADHD: Bridging the Research-Practice Gap Through Developmentally Informed Assessment and Treatment

This is not a story about what is broken.

It is a story about what has been waiting to be understood.

The mental health field had long concentrated its focus on attention-deficit/hyperactivity disorder (ADHD) as it presented in childhood, with comparatively little attention paid to the persistence and clinical expression of ADHD across the adult lifespan (Kooij, 2025). Cortese et al. (2025) and Kooij (2025), writing in the same issue of World Psychiatry, pursued a corrective path by focusing not on ADHD as a childhood-bound condition, but instead on how the disorder continues to manifest and to impair well into adulthood. These authors recognized the need for a paradigm shift in how adult ADHD is conceptualized; that is, not as a residual of childhood disorder, but as a condition with its own developmental trajectory, distinct clinical presentation, and evidence-based treatment needs.

Cortese et al. (2025) confirmed that ADHD persists into adulthood at an estimated worldwide prevalence of approximately 2.5%, with up to 70% of individuals with childhood-onset ADHD continuing to experience impairing symptoms as adults, even when full diagnostic criteria are no longer met. Kooij (2025) emphasized that the research base for adult ADHD has historically lagged behind both the childhood literature and other adult psychiatric conditions; this lag is not a minor oversight but has shaped and limited how clinicians assess, diagnose, and treat adults who have been living with unrecognized impairment across the course of their lives.

The overt motor hyperactivity commonly associated with childhood ADHD often diminishes in visibility with age; what persists, however, are chronic difficulties across multiple functional domains (i.e., attention regulation, executive functioning, self-organization, emotional dysregulation, time management, and occupational performance). These are not peripheral inconveniences but rather measurable, chronic impairments that manifest simultaneously across multiple life domains (i.e., relationships, employment, finances, health self-management, and subjective wellbeing). Adults presenting with long-undiagnosed ADHD frequently arrive in clinical settings having accumulated years of secondary consequences, such as anxiety, depression, diminished self-esteem, and the deeply internalized belief that their difficulties reflect a personal deficit of effort rather than a neurobiological condition.

Cortese et al. (2025) emphasized the growing need for comprehensive, multidomain approaches to both assessment and treatment; approaches that account for the broad functional impact of ADHD across the lifespan rather than focusing narrowly on symptom count alone. Kooij (2025) further noted that developmentally tailored assessment tools are needed, as adult presentations of ADHD frequently look quite different from the textbook childhood picture; thus, what is required is not a downward extension of pediatric models, but rather an upward extension of the evidence base toward adult-specific frameworks. Clinicians working with adults require sufficient training to recognize ADHD in its adult form and to address the comorbidities (i.e., anxiety, depression, and substance use) that commonly accompany it.

The clinical and ethical implications are clear. Adults presenting with chronic difficulties in attention, organization, and self-regulation deserve rigorous and informed evaluation rather than reflexive skepticism regarding the validity of their experience; the prevalence data and the functional burden documented by Cortese et al. (2025) demand nothing less. The paradigm shift these authors describe is both intellectual and ethical; catching up on the research lag is not merely an academic exercise, but rather an overdue recognition that the struggles of adults with ADHD have a name, a neurobiological basis, and evidence-based pathways toward meaningful improvement.

This article is the first in a continuing series examining the evolving clinical landscape of adult ADHD. Stay tuned as the series builds toward a broader framework, one that moves well beyond deficits toward something the literature has only begun to explore.

References

Cortese, S., Bellgrove, M. A., Brikell, I., Franke, B., Goodman, D. W., Hartman, C. A., Larsson, H., Levin, F. R., Ostinelli, E. G., Parlatini, V., Ramos-Quiroga, J. A., Sibley, M. H., Tomlinson, A., Wilens, T. E., Wong, I. C. K., Hovén, N., Didier, J., Correll, C. U., Rohde, L. A., & Faraone, S. V. (2025). Attention-deficit/hyperactivity disorder (ADHD) in adults: Evidence base, uncertainties and controversies. World Psychiatry, 24(3), 347–371. https://doi.org/10.1002/wps.21374

Kooij, J. J. S. (2025). New developments and potential future research directions in adult ADHD. World Psychiatry, 24(3), 381–382. https://doi.org/10.1002/wps.21351