Joshua Langfus, PhD

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Clinical Psychology Postdoctoral Scholar
University of California, San Francisco

Expanding access to evidence-based mental health services for youth with attention and behavior challenges.

Enhancing processes for accurate assessment, diagnosis, and treatment monitoring

Training & Appointments

University of California, San Francisco

Postdoctoral Scholar June 2026
Clifford Attkisson Clinical Services Research Training Program (NIH T32MH018261)
Primary Mentor: Lauren Haack, PhD
Social-Transcultural Research and Intervention Valuing Equity (STRIVE) Lab

Postdoctoral Fellow July 2025 - June 2026
Predoctoral Intern July 2024 - June 2025
Clinical Psychology Training Program (CPTP)
PI: Linda Pfiffner, PhD
Hyperactivity, Attention and Learning Problems (HALP) Lab

University of North Carolina at Chapel Hill

PhD, Psychology, Clinical Child & Family Track August 2025
MA, Psychology May 2020
Formal Concentration in Quantitative Psychology
Advisor: Eric Youngstrom, PhD

Johns Hopkins University

BA, Cognitive Science, Philosophy May 2015
With University Honors & Honors in Cognitive Science

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  • Fulbright English Teaching Award

    Teaching assistant at a bilingual secondary school in Madrid, Spain (2015-2016)

  • 6+ Years of Clinical Training in Evidence-Based Practices

    Dialectical Behavioral Therapy, Cognitive Behavioral Therapy, and Parent Management Training with Individuals and Groups

  • Implemented Bilingual Training for School ADHD Treatment

    Trained school clinicians to deliver evidence-based ADHD treatments in English and Spanish

Selected Publications

Google Scholar
OSF.io
ResearchGate

Langfus, J.A., Reynolds, C., Findling, R.L., Youngstrom, E.A. (2026). Developing the Reactive Aggression Assessment (RAGA-16) Part 1: Item Selection and Initial Validation. Journal of Clinical Child and Adolescent Psychology. https://doi.org/10.1080/15374416.2026.2697211

Langfus, J.A., Findling, R.L., Fatourou, E., Delph, K., Nair, S., Quesenberry, J., Stepanova, E., Youngstrom, E.A. (2026). Developing the Reactive Aggression Assessment (RAGA-16) Part II: Clinical Validation. Journal of Clinical Child and Adolescent Psychology. https://doi.org/10.1080/15374416.2026.2697487

Langfus, J., Youngstrom, E.A., Daniel, D., Busner, J., Findling, R., (2024). A Further Replication and extension of the Reliability, criterion Validity, and Treatment Sensitivity of the PANSS10 and PANS20 for Pediatric Trials. Journal of Child and Adolescent Psychopharmacology. https://doi.org/10.1089/cap.2024.0078.

Langfus, J.A., Youngstrom, E.A., DuBois, C., Stepanova, E. (2023) Scoping Review: Evidence-Based Assessment of Reactive Aggression in Children. JAACAP Open. https://doi.org/10.1016/j.jaacop.2023.08.005.

Contact Me

You can reach out to me on Bluesky (@langfus.me) or send me an email using the form below

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