Publications

A selected list of scientific publications, book chapters, and books for 2022 and 2021 that exemplify our lab’s research approach and areas of expertise.

Further references, including publications from 2020 and earlier, are on the Resources page and in each of our members’ individual publication pages.

2025: Scientific publications (including early view)

Collins, C., Broglia, E., & Barkham, M. (2025). Evaluating the evidence base for university counseling services and their effectiveness using CORE measures: A systematic review and meta-analysis. Journal of Affective Disorders, 372, 451–462. https://doi.org/10.1016/j.jad.2024.12.022

de Jong, K., Douglas, S., Wolpert, M., Delgadillo, J., Aas, B., Bovendeerd, B., Carlier, I., Compare, A., Edbrooke-Childs, J., Janse, P., Lutz, W., Moltu, C., Nordberg, S., Poulsen, S., Rubel, J. A., Schiepek, G., Schilling, V. N. L. S., van Sonsbeek, M., & Barkham, M. (2025). Using progress feedback to enhance treatment outcomes: A narrative review. Administration and Policy in Mental Health, 52(1), 210–222. https://doi.org/10.1007/s10488-024-01381-3

Douglas, S., Bovendeerd, B., van Sonsbeek, M., Manns, M., Milling, X. P., Tyler, K., Bala, N., Satterthwaite, T., Hovland, R. T., Amble, I., Atzil-Slonim, D., Barkham, M., de Jong, K., Kendrick, T., Nordberg, S. S., Lutz, W., Rubel, J. A., Skjulsvik, T., & Moltu, C. (2025). A clinical leadership lens on implementing progress feedback in three countries: Development of a multidimensional qualitative coding scheme. Administration and Policy in Mental Health, 52(1), 11–27. https://doi.org/10.1007/s10488-023-01314-6

Gonçalves, M. M., Lutz, W., Schwartz, B., Oliveira, J. T., Saarni, S. E., Tishby, O., Rubel, J. A., Boehnke, J. R., Montesano, A., Paiva, D., Ceridono, D., Zech, E., Willemsen, J., Saarni, S. I., Kompan Erzar, K., Janeiro, L., Gelo, O. C. G., Errázuriz, P., Holas, P., Styła, R., … Barkham, M. (2024). Developing a European Psychotherapy Consortium (EPoC): Towards adopting a single-item self-report outcome measure across European countries. Clinical Psychology in Europe, 6(3), e13827. https://doi.org/10.32872/cpe.13827

2024: Scientific publications

Barkham, M., Broglia, E., & SCORE Consortium. (2024). Routine Outcome Monitoring (ROM) and feedback in university student counselling and mental health services: Considerations for practitioners and service leads. Counselling & Psychotherapy Research, 24(2), 459–471. https://doi.org/10.1002/capr.12694

Bowker, H., Saxon, D., & Delgadillo, J. (2024). First impressions matter: The influence of initial assessments on psychological treatment initiation and subsequent dropout. Psychotherapy Research, 1–11. Advance online publication. https://doi.org/10.1080/10503307.2024.2308164

Currier, J. M., McDermott, R. C., Sanders, P., Barkham, M., Owen, J., Saxon, D., & Richards, P. S. (2024). Practice-based evidence for spiritually integrated psychotherapies: Examining trajectories of psychological and spiritual distress. Journal of Counseling Psychology, 71(4), 291–303. https://doi.org/10.1037/cou0000727

Davey, E., Allen, K., Bennett, S. D., Bryant-Waugh, R., Clarke, T., Cooper, Z., Dixon-Ward, K., Dudley, J., Eisler, I., Griffiths, J., Hill, A. J., Micali, N., Murphy, R., Picek, I., Rea, R., Schmidt, U., Simic, M., Tchanturia, K., Traviss-Turner, G., Treasure, J., … Shafran, R. (2023). Improving programme-led and focused interventions for eating disorders: An experts' consensus statement-A UK perspective. European Eating Disorders Review, 31(5), 577–595. https://doi.org/10.1002/erv.2981

Deisenhofer, A. K., Barkham, M., Beierl, E. T., Schwartz, B., Aafjes-van Doorn, K., Beevers, C. G., Berwian, I. M., Blackwell, S. E., Bockting, C. L., Brakemeier, E. L., Brown, G., Buckman, J. E. J., Castonguay, L. G., Cusack, C. E., Dalgleish, T., de Jong, K., Delgadillo, J., DeRubeis, R. J., Driessen, E., Ehrenreich-May, J., … Cohen, Z. D. (2024). Implementing precision methods in personalizing psychological therapies: Barriers and possible ways forward. Behaviour Research and Therapy, 172, 104443. https://doi.org/10.1016/j.brat.2023.104443

De Jong, K., Douglas, S., Wolpert, M., Delgadillo, J., Aas, B., Bovendeerd, B., Carlier, I., Compare, A., Edbrooke-Childs, J., Janse, P., Lutz, W., Moltu, C., Nordberg, S., Poulsen, S., Rubel, J. A., Schiepek, G., Schilling, V. N. L. S., van Sonsbeek, M., & Barkham, M. (2024). Using progress feedback to enhance treatment outcomes: A narrative review. Administration and policy in mental health, 10.1007/s10488-024-01381-3.

Delgadillo, J., Nissen-Lie, H. A., De Jong, K., Schröder, T. A., & Barkham, M. (2024). An examination of therapists' professional characteristics as moderators of the effect of feedback on psychological treatment outcomes. Psychotherapy Research, 1–11. Advance online publication. https://doi.org/10.1080/10503307.2024.2310635

Fernández-Alvarez, J., Molinari, G., Kilcullen, R., Delgadillo, J., Drill, R., Errázuriz, P., Falkenstrom, F., Firth, N., O'Shea, A., Paz, C., Youn, S. J., & Castonguay, L. G. (2024). The Importance of conducting practice-oriented research with underserved populations. Administration and policy in mental health, 51(3), 358–375. https://doi.org/10.1007/s10488-023-01337-z

Hart, M., Hirneth, S., Mendelson, J., Jenkins, L., Pursey, K., & Waller, G. (2024). Brief cognitive behavioural therapy for eating disorders symptomatology among a mixed sample of adolescents and young adults in primary care: A non-randomised feasibility and pilot study. European Eating Disorders Review, 32(4), 676–686. https://doi.org/10.1002/erv.3075

James, K., Saxon, D., & Barkham, M. (2024). Transforming the effectiveness and equity of a psychological therapy service: A case study in the English NHS Talking Therapies program. Administration and Policy in Mental Health, 10.1007/s10488-024-01403-0.

Lee, R., McMillan, D., Delgadillo, J., Alexander, R., & Lucock, M. (2024). Cognitive change before sudden gains in cognitive behavioural therapy for panic disorder. Behavioural and Cognitive Psychotherapy, 52(2), 107–118. https://doi.org/10.1017/S1352465823000449

Lorimer, B., Kellett, S., Giesemann, J., Lutz, W., & Delgadillo, J. (2024). An investigation of treatment return after psychological therapy for depression and anxiety. Behavioural and Cognitive Psychotherapy, 52(2), 149–162. https://doi.org/10.1017/S1352465823000322

Newcombe, C., Broglia, E., & Wright, C. (2024). Comparison of outcomes from a university counselling service before and during covid‐19: Exploring the use of remote therapy. Counselling & Psychotherapy Research. Advance online publication. https://doi.org/10.1002/capr.12821

Núñez, C., Delgadillo, J., Barkham, M., & Behn, A. (2024). Understanding symptom profiles of depression with the PHQ-9 in a community sample using network analysis. European psychiatry : the journal of the Association of European Psychiatrists, 67(1), e50. https://doi.org/10.1192/j.eurpsy.2024.1756

Saxon, D., Broglia, E., Duncan, C., & Barkham, M. (2024). Variability in treatment effects in an English national dataset of psychological therapies: The relationships between severity, treatment duration, and therapy type. Journal of Affective Disorders, 362, 244–255. https://doi.org/10.1016/j.jad.2024.06.115

Tait, J., Kellett, S., Saxon, D., Deisenhofer, A. K., Lutz, W., Barkham, M., & Delgadillo, J. (2024). Individual treatment selection for patients with post-traumatic stress disorder: External validation of a personalised advantage index. Psychotherapy Research, 1–14. Advance online publication. https://doi.org/10.1080/10503307.2024.2360449

Vrabel, K. R., Waller, G., Goss, K., Wampold, B., Kopland, M., & Hoffart, A. (2024). Cognitive behavioral therapy versus compassion focused therapy for adult patients with eating disorders with and without childhood trauma: A randomized controlled trial in an intensive treatment setting. Behaviour Research and Therapy, 174, 104480. https://doi.org/10.1016/j.brat.2024.104480

Waller, G., & Beard, J. (2024). Recent Advances in Cognitive-Behavioural Therapy for Eating Disorders (CBT-ED). Current Psychiatry Reports, 26(7), 351–358. https://doi.org/10.1007/s11920-024-01509-0

Zipfel, S., Lutz, W., Schneider, S., Schramm, E., Delgadillo, J., & Giel, K. E. (2024). The future of enhanced psychotherapy: Towards precision psychotherapy. Psychotherapy and Psychosomatics, 93(4), 230–236. https://doi.org/10.1159/000539022

2023: Scientific publications

Barkham, M. (2023). Smaller effects matter in the psychological therapies: 25 years on from Wampold et al. (1997). Psychotherapy Research, 33(4), 530–532. https://doi.org/10.1080/10503307.2022.2141589

Barkham, M., & Broglia, E. (2023). Routine outcome monitoring (ROM) and feedback in university student counselling and mental health services: Considerations for practitioners and service leads. Counselling and Psychotherapy Research, XX-XX. Advance online publication. https://doi.org/10.1002/capr.12694

Barkham, M., De Jong, K., Delgadillo, J., & Lutz, W. (2023). Routine Outcome Monitoring (ROM) and feedback: Research review and recommendations. Psychotherapy Research, 1–15. Advance online publication. https://doi.org/10.1080/10503307.2023.2181114

Beard, J., Cooper, Z., Masson, P., Mountford, V. A., Murphy, R., Raykos, B., Tatham, M., Thomas, J. J., Turner, H. M., Wade, T. D., & Waller, G. (2023). Assessing clinician competence in the delivery of cognitive-behavioural therapy for eating disorders: development of the Cognitive-Behavioural Therapy Scale for Eating Disorders (CBTS-ED). Cognitive Behaviour Therapy, 1–19. Advance online publication. https://doi.org/10.1080/16506073.2023.2263640

Broglia, E., Nisbet, K., Bone, C., Simmonds-Buckley, M., Knowles, L., Hardy, G., Gibbon, L., & Barkham, M. (2023). What factors facilitate partnerships between higher education and local mental health services for students? A case study collective. BMJ Open, 13(12), e077040. https://doi.org/10.1136/bmjopen-2023-077040

Brown, G. P., Delgadillo, J. & Golino, H. (2023). Distinguishing the dimensions of the original Dysfunctional Attitude Scale in an archival clinical sample. Cognitive Therapy and Research, 47, 69–83. https://doi.org/10.1007/s10608-022-10333-w

Delgadillo, J., Budimir, S., Barkham, M., Humer, E., Pieh, C., & Probst, T. (2023). A Bayesian network analysis of psychosocial risk and protective factors for suicidal ideation. Frontiers in Public Health, 11, 1010264. https://doi.org/10.3389/fpubh.2023.1010264

Douglas, S., Bovendeerd, B., van Sonsbeek, M., Manns, M., Milling, X. P., Tyler, K., Bala, N., Satterthwaite, T., Hovland, R. T., Amble, I., Atzil-Slonim, D., Barkham, M., de Jong, K., Kendrick, T., Nordberg, S. S., Lutz, W., Rubel, J. A., Skjulsvik, T., & Moltu, C. (2023). A clinical leadership lens on implementing progress feedback in three countries: Development of a multidimensional qualitative coding scheme. Administration and Policy in Mental Health, 10.1007/s10488-023-01314-6. Advance online publication. https://doi.org/10.1007/s10488-023-01314-6

Duffy, K. E. M., Simmonds-Buckley, M., Haake, R., Delgadillo, J., & Barkham, M. (2023). The efficacy of individual humanistic-experiential therapies for the treatment of depression: A systematic review and meta-analysis of randomized controlled trials. Psychotherapy Research, 1–16. Advance online publication. https://doi.org/10.1080/10503307.2023.2227757

Duncan, C., Cooper, M., & Saxon, D. (2023). Test-retest stability, convergent validity, and sensitivity to change for the Goal-Based Outcome tool for adolescents: Analysis of data from a randomized controlled trial. Journal of Clinical Psychology, 79(3), 683–696. https://doi.org/10.1002/jclp.23422

Fernández-Alvarez, J., Molinari, G., Kilcullen, R., Delgadillo, J., Drill, R., Errázuriz, P., Falkenstrom, F., Firth, N., O'Shea, A., Paz, C., Youn, S. J., & Castonguay, L. G. (2023). The importance of conducting practice-oriented research with underserved populations. Administration and Policy in Mental Health, 10.1007/s10488-023-01337-z. Advance online publication. https://doi.org/10.1007/s10488-023-01337-z

Firth, N., Barkham, M., Delgadillo, J., Bell, A., & O'Cathain, A. (2023). The role of socioeconomic deprivation in explaining neighborhood and clinic effects in the effectiveness of psychological interventions. Journal of Consulting and Clinical Psychology, 91(2), 82–94. https://doi.org/10.1037/ccp0000784

Gaskell, C., Kellett, S., Simmonds-Buckley, M., Curran, J., Hetherington, J., & Delgadillo, J. (2023). Long-term psychotherapy in tertiary care: A practice-based benchmarking study. The British Journal of Clinical Psychology, 62(2), 483–500. https://doi.org/10.1111/bjc.12424

Gaskell, C., Power, N., Novakova, B., Simmonds-Buckley, M., Reuber, M., Kellett, S., & Rawlings, G. H. (2023). A meta-analytic review of the effectiveness of psychological treatment of functional / dissociative seizures on non-seizure outcomes in adults. Epilepsia, Advance online publication. https://doi.org/10.1111/epi.17626

Gaskell, C., Simmonds-Buckley, M., Kellett, S., Stockton, C., Somerville, E., Rogerson, E., & Delgadillo, J. (2023). The effectiveness of psychological interventions delivered in routine practice: Systematic review and meta-analysis. Administration and Policy in Mental Health, 50(1), 43–57. https://doi.org/10.1007/s10488-022-01225-y

Giesemann, J., Delgadillo, J., Schwartz, B., Bennemann, B., & Lutz, W. (2023). Predicting dropout from psychological treatment using different machine learning algorithms, resampling methods, and sample sizes. Psychotherapy Research, 1–13. Advance online publication. https://doi.org/10.1080/10503307.2022.2161432

Laker, V., Simmonds-Buckley, M., Delgadillo, J., Palmer, L., & Barkham, M. (2023). Pragmatic randomized controlled trial of the Mind Management Skills for Life Programme as an intervention for occupational burnout in mental healthcare professionals. Journal of Mental Health, 1–9. Advance online publication. https://doi.org/10.1080/09638237.2023.2182423

Langthorne, D., Beard, J., & Waller, G. (2023). Therapist factors associated with intent to use exposure therapy: a systematic review and meta-analysis. Cognitive Behaviour Therapy, 52(4), 347–379. https://doi.org/10.1080/16506073.2023.2191824

Moore, E., & Waller, G. (2023). Brief group cognitive-behavioral therapy for bulimia nervosa and binge-eating disorder: A pilot study of feasibility and acceptability. The International Journal of Eating Disorders, 56(6), 1228–1232. https://doi.org/10.1002/eat.23935

Nye, A., Delgadillo, J., & Barkham, M. (2023). Efficacy of personalized psychological interventions: A systematic review and meta-analysis. Journal of Consulting and Clinical Psychology. Advance online publication. https://doi.org/10.1037/ccp0000820

Paton, L. W., Tiffin, P. A., Barkham, M., Bewick, B. M., Broglia, E., Edwards, L., Knowles, L., McMillan, D., & Heron, P. N. (2023). Mental health trajectories in university students across the COVID-19 pandemic: findings from the Student Wellbeing at Northern England Universities prospective cohort study. Frontiers in Public Health, 11, 1188690. https://doi.org/10.3389/fpubh.2023.1188690

Sales, C. M. D., Ashworth, M., Ayis, S., Barkham, M., Edbrooke-Childs, J., Faísca, L., Jacob, J., Xu, D., & Cooper, M. (2023). Idiographic patient reported outcome measures (I-PROMs) for routine outcome monitoring in psychological therapies: Position paper. Journal of Clinical Psychology, 79(3), 596–621. https://doi.org/10.1002/jclp.23319

Saxon, D., Barkham, M., Bee, P., Gellatly, J., Faija, C., & Bower, P. (2023). Telephone treatments in Improving Access to Psychological Therapies services: an analysis of use and impact on treatment uptake. BMC Psychiatry, 23(1), 95. https://doi.org/10.1186/s12888-022-04404-1

Scruggs, R., Broglia, E., Barkham, M., & Duncan, C. (2023). The impact of psychological distress and university counselling on academic outcomes: Analysis of a routine practice-based dataset. Counselling and Psychotherapy Research, 00, 1– 9. https://doi.org/10.1002/capr.12640

Strauss, C., Bibby-Jones, A. M., Jones, F., Byford, S., Heslin, M., Parry, G., Barkham, M., Lea, L., Crane, R., de Visser, R., Arbon, A., Rosten, C., & Cavanagh, K. (2023). Clinical effectiveness and cost-effectiveness of supported mindfulness-based cognitive therapy self-help compared with supported cognitive behavioral therapy self-help for adults experiencing depression: The Low-Intensity Guided Help Through Mindfulness (LIGHTMind) randomized clinical trial. JAMA Psychiatry, 80(5), 415–424. https://doi.org/10.1001/jamapsychiatry.2023.0222

2022: Scientific publications

Barkham, M., Lutz, W., & Castonguay, L. G. (2022). Das 50-jährige Jubiläum des Bergin and Garfield Handbook of Psychotherapy and Behavior Change [The 50th Anniversary Edition of Bergin and Garfield's Handbook of Psychotherapy and Behavior Change]. Psychotherapie, Psychosomatik, medizinische Psychologie, 72(1), 7–8. https://doi.org/10.1055/a-1686-4682

Bruijniks, S., van Bronswijk, S. C., DeRubeis, R. J., Delgadillo, J., Cuijpers, P., & Huibers, M. (2022). Individual differences in response to once versus twice weekly sessions of CBT and IPT for depression. Journal of Consulting and Clinical Psychology, 90(1), 5–17. https://doi.org/10.1037/ccp0000658

Delgadillo, J., Ali, S., Fleck, K., Agnew, C., Southgate, A., Parkhouse, L., Cohen, Z. D., DeRubeis, R. J., & Barkham, M. (2022). Stratified care vs stepped care for depression: A cluster randomized clinical trial. JAMA Psychiatry, 79(2), 101–108. https://doi.org/10.1001/jamapsychiatry.2021.3539

Delgadillo, J., Deisenhofer, A.-K., Probst, T., Shimokawa, K., Lambert, M. J., & Kleinstauber, M. (2022). Progress feedback narrows the gap between more and less effective therapists: A therapist effects meta-analysis of clinical trials. Journal of Consulting and Clinical Psychology, 90(7), 559–567. https://doi.org/10.1037/ccp0000747

Duffy, K. E. M., Simmonds-Buckley, M., Saxon, D., Delgadillo, J., & Barkham, M. (2022). Early response as a prognostic indicator in person-centered experiential therapy for depression. Journal of Counseling Psychology, 10.1037/cou0000633. Advance online publication. https://doi.org/10.1037/cou0000633

Faija, C. L., Bee, P., Lovell, K., Lidbetter, N., Gellatly, J., Ardern, K., Rushton, K., Brooks, H., McMillan, D., Armitage, C. J., Woodhouse, R., & Barkham, M. (2022). Using routine outcome measures as clinical process tools: Maximising the therapeutic yield in the IAPT programme when working remotely. Psychology and Psychotherapy, 10.1111/papt.12400. Advance online publication.
https://doi.org/10.1111/papt.12400

Firth, N., Barkham, M., Delgadillo, J., Allery, K., Woodward, J., & O'Cathain, A. (2022). Socioeconomic deprivation and dropout from contemporary psychological intervention for common mental disorders: A systematic review. Administration and Policy in Mental Health, 49(3), 490–505.
https://doi.org/10.1007/s10488-021-01178-8

Fletcher, A. C., & Delgadillo, J. (2022). Psychotherapists' personality traits and their influence on treatment processes and outcomes: A scoping review. Journal of Clinical Psychology, 78(7), 1267–1287.
https://doi.org/10.1002/jclp.23310

Hunt, V. J., & Delgadillo, J. (2022). Is alcohol use associated with psychological treatment attendance and clinical outcomes? The British Journal of Clinical Psychology, 61(2), 527–540.
https://doi.org/10.1111/bjc.12343

Lutz, W., Schwartz, B., & Delgadillo, J. (2022). Measurement-based and data-informed psychological therapy. Annual Review of Clinical Psychology, 18, 71–98.
https://doi.org/10.1146/annurev-clinpsy-071720-014821

Pott, S. L., Kellett, S., Green, S., Daughters, S., & Delgadillo, J. (2022). Behavioral activation for depression delivered by drug and alcohol treatment workers: A pilot randomized controlled trial. Journal of Substance Abuse Treatment, 139, 108769.
https://doi.org/10.1016/j.jsat.2022.108769

Power, N., Noble, L. A., Simmonds-Buckley, M., Kellett, S., Stockton, C., Firth, N., & Delgadillo, J. (2022). Associations between treatment adherence-competence-integrity (ACI) and adult psychotherapy outcomes: A systematic review and meta-analysis. Journal of Consulting and Clinical Psychology, 90(5), 427–445.
https://doi.org/10.1037/ccp0000736

Richards, P. S., & Barkham, M. (2022). Enhancing the evidence base for spiritually integrated psychotherapies: Progressing the paradigm of practice-based evidence. Psychotherapy, 59(3), 303–306. https://doi.org/10.1037/pst0000438

Sales, C., Ashworth, M., Ayis, S., Barkham, M., Edbrooke-Childs, J., Faísca, L., Jacob, J., Xu, D., & Cooper, M. (2022). Idiographic patient reported outcome measures (I-PROMs) for routine outcome monitoring in psychological therapies: Position paper. Journal of Clinical Psychology, 10.1002/jclp.23319. Advance online publication.
https://doi.org/10.1002/jclp.23319

Simmonds-Buckley, M., Osivwemu, E. O., Kellett, S., & Taylor, C. (2022). The acceptability of cognitive analytic therapy (CAT): Meta-analysis and benchmarking of treatment refusal and treatment dropout rates. Clinical Psychology Review, 102187. https://doi.org/10.1016/j.cpr.2022.102187

Tait, J., Edmeade, L., & Delgadillo, J. (2022). Are depressed patients' coping strategies associated with psychotherapy treatment outcomes? Psychology and Psychotherapy, 95(1), 98–112.
https://doi.org/10.1111/papt.12368

Toro, C. T., Jackson, T., Payne, A. S., Walasek, L., Russell, S., Daly, G., Waller, G., & Meyer, C. (2022). A feasibility study of the delivery of online brief cognitive-behavioral therapy (CBT-T) for eating disorder pathology in the workplace. The International Journal of Eating Disorders, 55(5), 723–730.
https://doi.org/10.1002/eat.23701

Turk, F., Kellett, S., & Waller, G. (2022). Comparing self-compassion versus body exposure for adult women with moderate to severe body dissatisfaction: A feasibility and pilot trial. Clinical Psychology and Psychotherapy, 10.1002/cpp.2724. Advance online publication.
https://doi.org/10.1002/cpp.2724

2021: Scientific publications

AlShebali, M., Becker, C., Kellett, S., AlHadi, A., & Waller, G. (2021). Adapting the body project to a non-western culture: A dissonance-based eating disorders prevention program for Saudi women. Eating and Weight Disorders: Studies on Anorexia, Bulimia and Obesity, 26, 2503–2512.
https://doi.org/10.1007/s40519-021-01104-9

Banyard, H., Behn, A. J., & Delgadillo, J. (2021). Personality disorders and their relation to treatment outcomes in cognitive behavioural therapy for depression: A systematic review and meta-analysis. Cognitive Therapy and Research, 45, 561–576.
https://doi.org/10.1007/s10608-021-10203-x

Barkham, M., Saxon, D., Hardy, G. E., Bradburn, M., Galloway, D., Wickramasekera, N., Keetharuth, A. D., Bower, P., King, M., Elliott, R., Gabriel, L., Kellett, S., Shaw, S., Wilkinson, T., Connell, J., Harrison, P., Ardern, K., Bishop-Edwards, L., Ashley, K.,... Brazier, J. E. (2021). Person-centred experiential therapy versus cognitive behavioural therapy delivered in the English Improving Access to Psychological Therapies service for the treatment of moderate or severe depression (PRaCTICED): A pragmatic, randomised, non-inferiority trial. The Lancet Psychiatry, 8(6), 487–499.
https://doi.org/10.1016/S2215-0366(21)00083-3

Bone, C., Simmonds-Buckley, M., Thwaites, R., Sandford, D., Merzhvynska, M., Rubel, J., ... Delgadillo, J. (2021). Dynamic prediction of psychological treatment outcomes: Development and validation of a prediction model using routinely collected symptom data. The Lancet Digital Health, 3(4), e231-e240.

Broglia, E., Millings, A., & Barkham, M. (2021). Student mental health profiles and barriers to help seeking: When and why students seek help for a mental health concern. Counselling and Psychotherapy Research. Advance online publication.
https://doi.org/10.1002/capr.12462

Chang, P. G. R. Y., Delgadillo, J., & Waller, G. (2021). Early response to psychological treatment for eating disorders: A systematic review and meta-analysis. Clinical Psychology Review, 86, 102032.
https://doi.org/10.1016/j.cpr.2021.102032

Chekroud, A. M., Bondar, J., Delgadillo, J., Dohery, G., Wasil, A., Fokkema, M., ... Choi, K. (2021). The promise of machine learning in predicting treatment outcomes in psychiatry. World Psychiatry, 20(2), 154-170.
https://doi.org/10.1002/wps.20882

Cooper, M., Stafford, M. R., Saxon, D., Beecham, J., Bonin, E., Barkham, M., ... Ryan, G. (2021). Humanistic counselling plus pastoral care as usual versus pastoral care as usual for the treatment of psychological distress in adolescents in UK state schools (ETHOS): A randomised controlled trial. The Lancet Child and Adolescent Health, 5(3), 178-189. P178-189,
https://doi.org/10.1016/S2352-4642(20)30363-1

Delgadillo., J. (2021). Machine learning: A primer for psychotherapy researchers. Psychotherapy Research, 31(1), 1-4.
https://doi.org/10.1080/10503307.2020.1859638

Delgadillo, J., McMillan, D., Gilbody, S., de Jong, K., Lucock, M., Lutz, W., ... Ali, S. (2021). Cost-effectiveness of feedback-informed psychological treatment: Evidence from the IAPT-FIT Trial. Behaviour Research and Therapy. Advance online publication.

Dolan, N., Simmonds-Buckley, M., Kellett, S., Siddell, E., & Delgadillo, J. (2021). Effectiveness of stress control large group psychoeducation for anxiety and depression: Systematic review and meta-analysis. The British Journal of Clinical Psychology. Advance online publication.
https://doi.org/10.1111/bjc.12288

Firth, N., Barkham, M., Delgadillo, J., Allery, K., Woodward, J., & O'Cathain, A. (2021). Socioeconomic deprivation and dropout from contemporary psychological intervention for common mental disorders: A systematic review. Administration and Policy in Mental Health and Mental Health Services Research.
https://doi.org/10.1007/s10488-021-01178-8

Gaskell, C., Askey-Jones, R., Groom, M., & Delgadillo, J. (2021). Effectiveness of transdiagnostic seminars to support patients with common mental disorders: A multi-service practice research network study. Behavioural and Cognitive Psychotherapy. Advance online publication.
https://doi.org/10.1017/S1352465821000114

Gaskell, C., Hague, B., & Kellett, S. (2021). Effectiveness of the unified protocol for treating co-morbid health anxiety and depression: An empirical case study. Behavioural and Cognitive Psychotherapy. Advance online publication.
https://doi.org/10.1017/S1352465821000205

Hernandez, M. E. H. & Waller, G. (2021). Are we on the same page? A comparison of patients’ and clinicians’ opinions about the importance of CBT techniques. Cognitive Behaviour Therapy. Advance online publication.
https://doi.org/10.1080/16506073.2020.1862292

Hiney-Saunders, K., Ousley, L. Caw, J., Cassinelli, E., & Waller, G. (2021). Effectiveness of treatment for adolescents and adults with anorexia nervosa in a routine residential setting. Eating Disorders: The Journal of Treatment and Prevention, 29(1), 103-117.
https://doi.org/10.1080/10640266.2019.1656460

Kellett, S., Simmonds-Buckley, M., Limon, E., Hague, J., Hughes, L., Stride, C., & Millings, A. (2021). Defining the assessment and treatment competencies to deliver low-intensity cognitive behavior therapy: A multi-center validation study. Behavior Therapy, 52(1), 15-27.
https://doi.org/10.1016/j.beth.2020.01.006

Kellett, S. & Stockton, D. (2021). Treatment of obsessive morbid jealousy with cognitive analytic therapy: A mixed-methods quasi-experimental case study. British Journal of Guidance and Counselling. Advance online publication. https://doi.org/10.1080/03069885.2021.1929834

Laker, V. & Waller, G. (2021). Does comparison of self with others influence body image among adult women? An experimental study in naturalistic settings. Eating and Weight Disorders – Studies on Anorexia, Bulimia and Obesity. Advance online publication.
https://doi.org/10.1007/s40519-021-01196-3

Lorimer, B., Delgadillo, J., Kellett, S., & Lawrence, J. (2021). Dynamic prediction and identification of cases at risk of relapse following completion of low-intensity cognitive behavioural therapy. Psychotherapy Research, 31(1), 19-32.
https://doi.org/10.1080/10503307.2020.1733127

Lorimer, B., Kellett, S., Nye, A., & Delgadillo, J. (2021). Predictors of relapse and recurrence following cognitive behavioural therapy for anxiety-related disorders: A systematic review. Cognitive Behaviour Therapy, 50(1), 1-18.
https://doi.org/10.1080/16506073.2020.1812709

Merzhvynska, M., Simmonds-Buckley, M., Delgadillo, J., & Kellett, S. (2021). Trajectories of change in the therapeutic alliance during cognitive analytic therapy for depression. Psychology and Psychotherapy: Theory, Research and Practice. Advance online publication.
https://doi.org/10.1111/papt.12322

Noble, L., Firth, N., Delgadillo, J., & Kellett, S. (2021). An investigation of the competencies involved in the facilitation of CBT-based group psychoeducational interventions. Behavioural and Cognitive Psychotherapy. Advance online publication.
https://doi.org/10.1017/S1352465821000084

Pott, S. L., Delgadillo, J., & Kellett, S. (2021). Is behavioral activation an effective and acceptable treatment for co-occurring depression and substance use disorders? A meta-analysis of randomized controlled trials. Journal of Substance Abuse Treatment. Advance online publication.
https://doi.org/10.1016/j.jsat.2021.108478

Priestley, M., Broglia, E., Hughes, G., & Spanner, L. (2021). Student perspectives on improving mental health support services at university. Counselling and Psychotherapy Research. Advance online publication.
https://doi.org/10.1002/capr.12391

Sheldon, E., Simmonds-Buckley, M., Bone, C., Mascarenhas, T., Chan, N., Wincott, M., ... Barkham, M. (2021). Prevalence and risk factors for mental health problems in university undergraduate students: A systematic review with meta-analysis. Journal of Affective Disorders, 287, 282-292.
https://doi.org/10.1016/j.jad.2021.03.054

Simmonds-Buckley, M., Catarino, A., & Delgadillo, J. (2021). Depression subtypes and their response to cognitive behavioural therapy: A latent transition analysis. Depression and Anxiety. Advance online publication.
https://doi.org/10.1002/da.23161

Stockton, D., Kellett, S., Wilkinson, N., Hague, J., Bliss, P., Heaver, M., & Devine, A. (2021). A feasibility and pilot randomised dismantling trial of the efficacy of self-as-context during acceptance and commitment therapy. International Journal of Cognitive Therapy. Advance online publication.
https://doi.org/10.1007/s41811-021-00118-6

Tait, J., Edmeade, L., & Delgadillo, J. (2021). Are depressed patients’ coping strategies associated with psychotherapy treatment outcomes? Psychology and Psychotherapy: Theory, Research and Practice. Advance online publication.
https://doi.org/10.1111/papt.12368

Wakefield, S., Delgadillo, J., Kellett, S., White, S., & Hepple, J. (2021). The effectiveness of brief cognitive analytic therapy for anxiety and depression: A quasi-experimental case-control study. British Journal of Clinical Psychology. Advance online publication.
https://doi.org/10.1111/bjc.12278

2021: Book chapters

Barkham, M., & Lambert, M. J. (2021). The efficacy and effectiveness of psychological therapies. In M. Barkham, Lutz, W., & Castonguay, L. G. (Eds.). Bergin and Garfield’s handbook of psychotherapy and behavior change. pp. 135–189. Seventh Edition. Wiley.

Castonguay, L. G., Barkham, M., Youn, S. J., & Page, A. C. (2021). Practice-based evidence – Findings from routine clinical settings. In M. Barkham, Lutz, W., & Castonguay, L. G. (Eds.). Bergin and Garfield’s handbook of psychotherapy and behavior change. pp. 191–222. Seventh Edition. Wiley.

Castonguay, L. G., Eubanks, C. F., Iwakabe, S., Krause, M., Page, A. C., Zilcha-Mano, S., Lutz, W., & Barkham, M. (2021). Epilogue: Prevalent themes, predictions, and recommendations. In M. Barkham, Lutz, W., & Castonguay, L. G. (Eds.). Bergin and Garfield’s handbook of psychotherapy and behavior change. pp. 793–802. Seventh Edition. Wiley.

Cohen, Z. D., Delgadillo, J., & DeRubeis, R. J. (2021). Personalized treatment approaches. In M. Barkham, Lutz, W., & Castonguay, L. G. (Eds.). Bergin and Garfield’s handbook of psychotherapy and behavior change. pp. 673–703. Seventh Edition. Wiley.

Lutz, W., Castonguay, L. G., Lambert, M. J., & Barkham, M. (2021). Traditions and new beginnings: Historical and current perspectives on research in psychotherapy and behavior change. In M. Barkham, Lutz, W., & Castonguay, L. G. (Eds.). Bergin and Garfield’s handbook of psychotherapy and behavior change. pp.3–18. Seventh Edition. Wiley.

Lutz, W., de Jong, K., Rubel, J. A., & Delgadillo, J. (2021). Measuring, predicting, and tracking change in psychotherapy. In M. Barkham, Lutz, W., & Castonguay, L. G. (Eds.). Bergin and Garfield’s handbook of psychotherapy and behavior change. pp. 89–133. Seventh Edition. Wiley.

2021: Books

Barkham, M., Lutz, W., & Castonguay, L. G. (Eds.). Bergin and Garfield’s handbook of psychotherapy and behavior change. Seventh Edition. Wiley.