Professor Peter Langdon

Professor Peter  Langdon

Department of Social Policy, Sociology and Criminology
Professor of Clinical Psychology

Professor Langdon completed his undergraduate studies in psychology at Memorial University of Newfoundland and went on to complete a Doctor in Clinical Psychology degree at the Institute of Psychology, Psychiatry and Neuroscience, King’s College, London as a Lord Rothermere Fellow.  He completed his PhD at the Tizard Centre, University of Kent as a National Institute for Health and Care Research (NIHR) Research Fellow, before going on to complete a NIHR funded postdoctoral award. He is an Approved Clinician and has worked in the NHS as a clinician throughout his career.

Bluesky: @peterlangdon.bsky.social

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Qualifications

  • PhD (Clinical Psychology)
  • DClinPsy
  • PGCertHE
  • BSc (Hons)
  • Fellow of the British Psychology Society
  • Chartered Psychologist
  • Fellow of the International Association for the Scientific Study of Intellectual and Developmental Disabilities
  • Approved Clinician
  • Registered Clinical and Forensic Psychologist

Biography

Professor Langdon has spent the majority of his career working within NHS secure mental healthcare with adults with intellectual and developmental disabilities. He is an approved clinician as defined within the Mental Health Act and is registered as both a clinical and forensic psychologist.  

He was previously awarded International Association for the Scientific Study of Intellectual and Developmental Disabilities (IASSIDD) Distinguished Achievement Award for Research He is serving as a member of the Board of Directors of IASSIDD from 2024 to 2026. He is also a Trustee of Asperger East Anglia. Professor Langdon is the Honorary Associate Director of Research for Herefordshire and Worcestershire Health and Care NHS Trust. Hehas supervised numerous clinical psychology trainees and PhD students and would welcome approaches from potential students and trainees.

Postgraduate supervision

Professor Langdon would welcome opportunities to supervise PhD students and trainee clinical psychologists who are interested in undertaking projects involving people with intellectual and developmental disabilities. This includes projects that focus upon criminal offending risk and/or forensic mental health as well as mental health.

Research

Research interests

Professor Langdon is primarily interested in undertaking research involving people with intellectual and developmental disabilities.  He is specifically interested in developing and testing complex health interventions within clinical trials. 

Current projects          

National Institute for Health and Care Research - Health Services and Delivery Research, 2024 to 2027. An evaluation of Care (EduCatIon) and treatment revIews for people with Learning dIsabilities and Autistic people (CECILIA). . £1447406.98. Chief Investigators:  Professor Peter Langdon and Dr Karen Bunning. 

National Institute for Health and Care Research - Health and Social Care Delivery Research, 2023-2026. High-quality Mental Capacity Act Assessments for Everyone: Improving Leadership, Assessment Procedures, and Patient Support (HELPS). £912,739.52. Chief Investigator: Professor Domenico Giacco. Co-applicant: Professor Peter Langdon. 

Social Sciences and Humanities Research Council of Canada. New Frontiers in Research Fund, Special Call, 2023-2025. Mobilising environments to improve psychological and physiological experiences of thriving in autistic people.$484172. Chief Investigator: Dr Jonathan Weiss. Co-applicant: Professor Peter Langdon 

National Institute for Health and Care Research - Research for Social Care, 2023 to 2025.  BRIDGING – Breakthrough interview extended reality training towards reducing the autism employment gap.  £339149. Chief Investigator:  Dr Michael Loizou. Co-applicant: Professor Peter Langdon. 

National Institute for Health and Care Research - Health Technology Assessment, 2023 to 2024. Medication support interventions and strategies for people with learning disabilities - a mixed methods evidence synthesis. £318545. Chief Investigator: Dr Yen-Fu Chen. Co-applicant: Professor Peter Langdon. 

Youth Endowment Fund, 2023 to 2026 - Standard Teen Triple P for parents/carers of 11–15-year-olds at the edge-of-care: a randomised controlled trial. £530116. Chief Investigators: Professor Kylie Gray and Dr Paul Thompson. Co-applicant: Professor Peter Langdon.

 National Institute for Health and Care Research - Health and Social Care Delivery Research, 2023 to 2025. Digital health participation of people with intellectual disabilities: a longitudinal modelling and digital diary study.  £648288. Chief Investigator: Dr Darren Chadwick. Co-applicant: Professor Peter Langdon.

 Youth Endowment Fund, 2022 to 2025 - A randomised controlled trial of brief solution focused Therapy with 10-17-year-olds presenting at policy custody: the Solutions Trial. £828414. Chief Investigators: Dr Sam Flynn and Professor Peter Langdon 

National Institute for Health and Care Research- Health Technology Assessment, 2021 to 2025. Guided self-help for depression in adults with autism spectrum disorders (ADEPT-2). £1,675,292. Chief Investigator: Dr Ailsa Russell. Co-applicant: Professor Peter Langdon. 

National Institute for Health and Care Research - Health Technology Assessment, 2021 to 2025. A randomised control trial of group cognitive behavioural therapy for men with intellectual and/or developmental disabilities and harmful sexual behaviour. £1,545,849. Chief Investigator: Professor Glynis Murphy. Co-applicant: Professor Peter Langdon. 

National Institute for Health and Care Research - Health Technology Assessment. Behavioural interventions to treat anxiety in adults with autism with moderate to severe intellectual disabilities (BEAMS-ID). Chief Investigator: Professor Peter Langdon. £197341.71. 

National Institute for Health and Care Research - Health Technology Assessment, 2020 to 2022. Specific phobias in children with learning disabilities (SPIRIT): An adaptation and feasibility study. Chief Investigator: Professor Kylie Gray. Co-applicant: Professor Peter Langdon. £199992.90. 

National Institute for Health and Care Research - Health Services and Delivery Research. Mapping and evaluating services for children with learning disabilities and behaviours that challenge (MELD). Chief Investigator: Professor Richard Hastings. Co-Applicant: Professor Peter Langdon £1,245,271.00 

Youth Endowment Fund, 2019 to 2022 - REducing the risk of criminal exploitation using multi-SystEmic Therapy (RESET Study). Chief Investigator: Professor Peter Langdon. £299728.00 

National Institute for Health and Care Research - Health Technology Assessment, 2019 to 2021- A multicentre double-blind placebo-controlled randomised trial of SerTRaline for AnxieTy in adults with Autism (STRATA) Chief Investigator: Dr Dheeraj Rai. Co-Applicant: Professor Peter Langdon. £1,669,262.68 (+ AUD $557,029.40 by NHMRC Australia to Leonard H, Starkstein S & Glasson E for Perth centre) 

National Institute for Health and Care Research - Health Technology Assessment, 2019-2022 - Eye movement desensitisation and reprocessing for symptoms of post-traumatic stress disorder in adults with intellectual disabilities (Trauma-AID). Chief Investigator: Professor Peter Langdon £1,258,097.68.

Publications

Recent publications

Article

Maguire, K, Barnoux, M, Collins, J, Melvin, C, Inkson, I, Alexander, RT, Devapriam, J, Duggan, C, Shepstone, L, Staufenburg, E, Thompson, P, Turner, D, Viding, E & Langdon, P 2025, 'The Factor Structure and Validity of the Psychopathy Checklist-Short Version When Used With Autistic Psychiatric Inpatients', Autism Research. https://doi.org/10.1002/aur.70004

Hewitt, O, Langdon, PE & Larkin, M 2025, 'Using Experience Based Co-Design to Develop a Novel Psychological Intervention With People With Intellectual Disabilities and Stakeholders', Journal of applied research in intellectual disabilities : JARID, vol. 38, no. 1, e70022. https://doi.org/10.1111/jar.70022

Vostanis, A, Ritchie, R & Langdon, P 2024, 'A Precision Teaching Framework for Training Autistic Students to Respond to Bids for Joint Attention', Journal of Behavioral Education. https://doi.org/10.1007/s10864-024-09568-2

Langdon, PE, Apanasionok, MM, Scripps, E, Barrowcliff, A, Biswas, A, Bunning, K, Burbidge, C, Byron-Daniel, K, Cookson, A, Croom, S, Filipczuk, M, Gillespie, D, Hastings, RP, Jahoda, A, McNamara, R, Patterson, L, Rai, D, Steward, R & Gray, KM 2024, 'Behavioural interventions to treat anxiety in adults with autism and moderate to severe intellectual disabilities: The BEAMS-ID feasibility study', Journal of Applied Research in Intellectual Disabilities, vol. 37, no. 5, e13282. https://doi.org/10.1111/jar.13282

Langdon, P, Apanasionok, MM, Scripps, E, Bunning, K, Filipczuk, M, Gillespie, D, Hastings, R, Jahoda, A, McNamara, R, Rai, D & Gray, K 2024, 'Behavioural interventions to treat anxiety in adults with autism and moderate to severe intellectual disabilities: the BEAMS-ID feasibility study', Health Technology Assessment, vol. 28, no. 72, pp. 1-147. https://doi.org/10.3310/MWTQ5721

Kooijmans, R, van Langen, M, Voss, H, Reichrath, E, Maljaars, J, Dalemans, R, Langdon, PE & Moonen, X 2024, 'Does adapting a self-report instrument to improve its cognitive accessibility for people with intellectual disability result in a better measure? − A cognitive interview study', Research in Developmental Disabilities, vol. 154, 104851. https://doi.org/10.1016/j.ridd.2024.104851

Buell, S, Pounds, G, Langdon, P & Bunning, K 2024, 'Easy read health information for people with intellectual disabilities: A linguistic discourse analysis. What happens to language when it is simplified?', Journal of Applied Research in Intellectual Disabilities, vol. 37, no. 6, e13293. https://doi.org/10.1111/jar.13293

Mckeon, HE, Cotton, L, Aldridge, R, Cape, A, Clout, M, Cooper, K, Dagnan, D, Dawn, E, Frost, J, Georgakopoulou, A, Garfield, K, Horwood, J, Ingham, B, Jervis, V, Kessler, D, Langdon, P, Metcalfe, C, Rai, D, Realpe, A, Russell, C, Sheridan, H, Slowinska, K, Thorn, J, Wen, L, Wiles, N & Russell, A 2024, 'Effectiveness and cost-effectiveness of guided self-help for depression for autistic adults: the Autism Depression Trial (ADEPT-2) - protocol for a multicentre, randomised controlled trial of a remotely delivered low-intensity intervention', BMJ open, vol. 14, no. 11, e084729. https://doi.org/10.1136/bmjopen-2024-084729

Redley, M, Heywood, R, Ryan, H, Killett, A, Jimoh, OF, Langdon, PE & Bunning, K 2024, 'Protecting and empowering adults with capacity-affecting conditions to take part in health and health-related research', Disability and Society. https://doi.org/10.1080/09687599.2023.2287411

on behalf of the STRATA autistic advisory group, Rai, D, Webb, D, Lewis, A, Cotton, L, Norris, JE, Alexander, R, Baldwin, DS, Brugha, T, Cochrane, M, Del Piccolo, MC, Glasson, EJ, Hatch, KK, Kessler, D, Langdon, PE, Leonard, H, MacNeill, SJ, Mills, N, Morales, MV, Morgan, Z, Mukherjee, R, Realpe, AX, Russell, A, Starkstein, S, Taylor, J, Turner, N, Thorn, J, Welch, J & Wiles, N 2024, 'Sertraline for anxiety in adults with a diagnosis of autism (STRATA): study protocol for a pragmatic, multicentre, double-blind, placebo-controlled randomised controlled trial', Trials, vol. 25, no. 1, 37. https://doi.org/10.1186/s13063-023-07847-3

Moody, G, Coulman, E, Crocker-White, E, Gray, K, Hastings, RP, Longman, A, Lugg-Widger, F, Playle, R, Segrott, J, Thompson, P, Badger, J, Langdon, PE & Flynn, S 2024, 'Solutions Trial: Solution Focused Brief Therapy (SFBT) in 10–17-year-olds presenting at police custody: a randomised controlled trial', Trials, vol. 25, no. 1, 159. https://doi.org/10.1186/s13063-024-07904-5

Chapter

Langdon, P, Roberts, K, Adams, D, Shaddel, F & Barrett, M 2024, Aggression and self-injurious behaviour. in Frith Prescribing Guidelines for People with Intellectual Disabilities. 4 edn, Cambridge University Press, Cambridge, pp. 131-154. https://doi.org/10.1017/9781009430715.012

Comment/debate

Thompson, PA, Moody, G, Coulman, E, Owen-Jones, E, Patel, F, Gray, KM, Hastings, RP, Longman, A, Lugg-Widger, F, Segrott, J, Badger, J, Flynn, S, Langdon, PE & Playle, R 2024, 'Correction to: Statistical analysis plan for the SOLUTIONS randomised controlled trial with internal pilot: Solution Focused Brief Therapy (SFBT) in 10–17-year-olds presenting at police custody', Trials, vol. 25, no. 1, 675. https://doi.org/10.1186/s13063-024-08529-4

Review article

Scripps, E, Sutherland, D, Langdon, PE, Hastings, RP & Gray, KM 2025, 'Supporting Parents of Adolescents With Intellectual Disabilities: A Systematic Review of Interventions', Journal of Applied Research in Intellectual Disabilities, vol. 38, no. 1, e70004. https://doi.org/10.1111/jar.70004

Nwokolo, EU, Langdon, PE & Murphy, GH 2024, 'Screening for Intellectual Disabilities and/or Autism Amongst Older Children and Young Adults: a Systematic Review of Tools for Use in Africa', Review Journal of Autism and Developmental Disorders, vol. 11, no. 2, pp. 384-406. https://doi.org/10.1007/s40489-022-00342-6

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