Selected Publications


Below is a selected list of scientific publications that exemplify our Lab’s research approach and areas of expertise. Further references can be found in each of our members’ individual publication pages.



Recent publications (2019)


Beard, J. I. L., & Delgadillo, J. (2019). Early response to psychological therapy as a predictor of depression and anxiety treatment outcomes: A systematic review and meta-analysis. Depression and Anxiety, 36, 866-878.


Firth, N., Delgadillo, J., Kellett, S., & Lucock, M. (2019). The influence of socio-demographic similarity and difference on adequate attendance of group psychoeducational cognitive behavioural therapy. Psychotherapy Research.


Firth, N., Saxon, D., Stiles, W. B., & Barkham, M. (2019). Therapist and clinic effects in psychotherapy: a three-level model of outcome variability. Journal of Consulting and Clinical Psychology, 87, 345–356.


Hardy, G. E., Bishop-Edwards, L., Chambers, E., Connell, J., Dent-Brown, K., Kothari, G., O’Hara, R., & Parry, G. D. (2019). Risk factors for negative experiences during psychotherapy. Psychotherapy Research, 29, 403-414.


Harrison, P., Hardy, G. E., & Barkham, M. (2019). The relationship between expected engagement and talking therapy outcome. Clinical Psychology and Psychotherapy, 26, 492-501.


Johns, R., Barkham, M., Kellett, S., & Saxon, D. (2019). A systematic review of therapist effects: A critical narrative update and refinement to Baldwin and Imel’s (2013) review.Clinical Psychology Review, 67, 78-93.


Moller, N. P., Ryan, G., Rollings, J., & Barkham, M. (2019). The 2018 UK NHS Digital annual report on the Improving Access to Psychological Therapies programme: A brief commentary. BMC Psychiatry, 19, 252.


Nye, A., Connell, J., Haake, R., & Barkham, M. (2019). Person-centred experiential therapy (PCET) training within a UK NHS IAPT service: experiences of selected counsellors in the PRaCTICED trial. British Journal of Guidance & Counselling, 47, 619-634.


Simmonds-Buckley, M., Kellett, S., & Waller, G. (2019). Acceptability and efficacy of group behavioral activation for depression among adults: A meta-analysis. Behavior Therapy, 50, 864-885.



Previous publications (2018 and earlier)


Avishai, A., Oldham, M., Kellett, S., & Sheeran, P. (2018). Sustaining attendance at a mental health service: A randomized controlled trial. Journal of Consulting and Clinical Psychology, 86, 1056-1060.


Barkham, M., & Saxon, D. (2018). The effectiveness of high-intensity CBT and Counselling alone and following low-intensity CBT: A reanalysis of the 2nd UK National Audit of Psychological Therapies data. BMC Psychiatry, 18:321.


Connell, J., Carlton, J., Grundy, A., Buck, E.T., Keetharuth, A.D., Ricketts, T., Barkham, M., Robotham, D., Rose, D., & Brazier, J. (2018). The importance of content and face validity in instrument development: lessons learnt from service users when developing the Recovering Quality of Life measure (ReQoL). Quality of Life Research, 27, 1893-1902.


Delgadillo, J., de Jong, K., Lucock, M., Lutz, W., Rubel, J., Gilbody, S., Ali, S., Aguirre, E., Appleton, M., Nevin, J., O’Hayon, H., Patel, U., Sainty, A., Spencer, P., & McMillan, D. (2018). Feedback-informed treatment versus usual psychological treatment for depression and anxiety: a multisite, open-label, cluster randomised controlled trial. The Lancet Psychiatry, 5, 564-572.


Delgadillo, J., Rhodes, L., Moreea, O., McMillan, D., Gilbody, S., Leach, C., Lucock, M., Lutz, W., & Ali, S. (2018). Relapse and recurrence of common mental health problems after low Intensity Cognitive Behavioural Therapy: The WYLOW longitudinal cohort study. Psychotherapy and Psychosomatics, 87, 116–117.


Delgadillo, J., Huey, D., Bennett, H., & McMillan, D. (2017). Case complexity as a guide for psychological treatment selection. Journal of Consulting and Clinical Psychology, 85, 835-853.


Delgadillo, J., Overend, K., Lucock, M., Groom, M., Kirby, N., McMillan, D., Gilbody, S., Lutz, W., Rubel, J.A., & de Jong, K. (2017). Improving the efficiency of psychological treatment using outcome feedback technology. Behaviour Research and Therapy, 99, 89-97.


Delgadillo, J., Moreea, O., & Lutz, W. (2016). Different people respond differently to therapy: A demonstration using patient profiling and risk stratification. Behaviour Research and Therapy, 79, 15-22.

Firth, N., Barkham, M., Kellett, S., & Saxon, D. (2015). Therapist effects and moderators of effectiveness and efficiency in psychological wellbeing practitioners: A multilevel modelling analysis. Behaviour Research and Therapy, 69, 54-62.


Green, H., Barkham, M., Kellett, S., & Saxon, D. (2014). Therapist effects in IAPT Psychological Wellbeing Practitioners (PWPs): A multilevel mixed methods approach. Behaviour Research and Therapy, 63, 43-54.


Hall, J., Kellett, S. Berrios, R., Scott, S., & Bains, M. (2016). Efficacy of cognitive behavioural therapy for generalised anxiety disorder in older adults: Systematic review, meta-analysis and meta-regression. American Journal of Geriatric Psychiatry, 11, 1063-1073.

Keetharuth, A. D., Brazier, J., Connell, J., Bjorner, J. B., Carlton, J., Buck, E. T., Ricketts, T., McKendrick, K., Browne, J., Croudace, T., & Barkham, M. (2018). Recovering Quality of Life (ReQoL): a new generic self-reported outcome measure for use with people experiencing mental health difficulties. The British Journal of Psychiatry, 212, 42-49.


Kellett, S., Stockton, C., Marshall, H., Hall, J., Jennings, C., & Degadillo, J. (2018). Efficacy of narrative reformulation during cognitive analytic therapy for depression: randomized dismantling trial. Journal of Affective Disorders, 239, 37-47.


Mulkens, S., de Vos, C., de Graaff, A., & Waller, G. (2018). To deliver or not to deliver cognitive behavioral therapy for eating disorders: Replication and extension of our understanding of why therapists fail to do what they should do. Behaviour Research and Therapy, 106, 57-63.


Oldham, M., Kellett, S., Miles, E., & Sheeran, P. (2012). Interventions to increase attendance at psychotherapy: A meta-analysis of randomised controlled trials. Journal of Consulting and Clinical Psychology, 80, 928-939.


Pybis, J., Saxon, D., Hill, A., & Barkham, M. (2017) The comparative effectiveness and efficiency of cognitive behaviour therapy and generic counselling in the treatment of depression: evidence from the 2(nd) UK National Audit of psychological therapies. BMC Psychiatry, 17: 215


Raykos, B. C., Erceg-Hurn, D., Fursland, A., McEvoy, P. M., & Waller, G. (2018). Severe and enduring anorexia nervosa? Illness severity and duration are unrelated to outcomes from cognitive behaviour therapy. Journal of Consulting and Clinical Psychology, 86, 702-709.


Rose, C., & Waller, G. (2017). Cognitive–behavioral therapy for eating disorders in primary care settings: Does it work, and does a greater dose make it more effective?International Journal of Eating Disorders, 50, 1305-1355.


Saxon, D., Ashley, K., Bishop-Edwards, L., Connell, J., Harrison, P., Ohlsen, S., Hardy, G.E., Mank, T., Bower, P., Bradburn, M., Brazier, J., Elliott, R., Gabriel, L., Kellett, S., King, M., Pilling, S., Shaw, S., Waller, G., & Barkham, M. (2017). A pragmatic randomized controlled trial assessing the non-inferiority of counselling for depression versus cognitive-behaviour therapy for patients in primary care meeting a diagnosis of moderate or severe depression (PRaCTICED): A study protocol for a randomized controlled trial. Trials, 18, 93.


Saxon, D., Firth, N., & Barkham, M. (2017).The relationship between therapist effects and therapy delivery factors. Administration and Policy in Mental Health and Mental Health Services Research, 44, 705-715.


Saxon, D., & Barkham, M. (2012). Patterns of therapist variability: Therapist effects and the contribution of patient severity and risk. Journal of Consulting and Clinical Psychology, 80, 535–546.


Saxon, D., & Barkham, M., Foster, A. & Parry, G.D. (2017) The contribution of therapist effects to patient dropout and deterioration in the psychological therapies. Clinical Psychology & Psychotherapy, 24, 575-588.


Schiefele, A-K., Lutz, W., Barkham, M., Rubel, J., Böhnke, J., Delgadillo, J., Kopta, M. Schulte, D., Saxon, D., Neilsen, S. L., & Lambert, M. (2017). Reliability of therapist effects in practice-based psychotherapy research: A guide for the planning of future studies. Administration and Policy in Mental Health, 44, 598-613.


Waller, G., Tatham, M., Turner, H., Mountford, V. A., Bennetts, A., Bramwell, K., Dodd. J., Ingram, L. (2018). A 10-session cognitive-behavioral therapy (CBT-T) for eating disorders: Outcomes from a case series of non-underweight adult patients. International Journal of Eating Disorders, 51, 262-269.