Glenys Parry

Image of Gleny ParryI am Emeritus Professor of Psychological Services Research at the University of Sheffield and have worked in the NHS for many years in clinical services, training, senior management and policymaking.  I developed my skills in CAT after editing Tony Ryle’s 1990 book ‘Cognitive Analytic Therapy: Active Participation in Change’ for Wiley.  I have a longstanding interest in the effective application of research to practice and have led or contributed to a number of Department of Health policy initiatives in psychological therapies.   In addition to individual psychotherapy, I am an experienced organisational consultant and management mentor.

Selected Publications

Bennett, D and Parry, G. (1998) The accuracy of reformulation in cognitive analytic therapy: a validation study. Psychotherapy Research, 8, 84-103.

Bennett, D. & Parry, G. (2004) A measure of psychotherapeutic competence derived from Cognitive Analytic Therapy.  Psychotherapy Research, 14, 176-192.

Bennett, D. & Parry, G. (2004) Maintaining the Therapeutic Alliance: Resolving Alliance- Threatening Interactions Related to the Transference.  Ch 12,  251 – 272 in D Charman: Core Processes in Brief Psychodynamic Psychotherapy: Advancing Effective Practice.  Lawrence Erlbaum Associates

Bennett, D., Parry, G. and Ryle, A. (2006), Resolving threats to the therapeutic alliance in cognitive analytic therapy of borderline personality disorder: A task analysis. Psychology and Psychotherapy: Theo, Res, Pra, 79: 395–418. doi: 10.1348/147608305X58355

Pickvance, D. & Parry, G. (2016) Clinical and ethical challenges in relational supervision.  Chapter 5, pp 71 – 94 in D Pickvance (ed) (2016) Cognitive Analytic Supervision: A relational approach.  Routledge.

Curran, J., Parry, G.D., Hardy,G.E., Darling, J., Mason, A-M., and Chambers, E., (2019) How Does Therapy Harm? A Model of Adverse Process Using Task Analysis in the Meta-Synthesis of Service Users’ Experience. Front. Psychol. 10:347. doi: 10.3389/fpsyg.2019.00347 (Open Access)

Spence C, Kellett S, Totterdell P, Parry G. (2019) Can cognitive analytic therapy treat hoarding disorder? An adjudicated hermeneutic single‐case efficacy design evaluation. Clin Psychol Psychother. 2019; 1–11.

Easton K, Kellett S, Cooper M, Millings A, Varela J, Parry G (in press) Blending Cognitive Analytic Therapy with a digital support tool: user-centered design of a prototype application. JMIR Mental Health. 17/08/2020:20213 (forthcoming/in press) URL:

Parry, G., Bennett, D., Roth, A.D. and Kellett, S. (2020), Developing a competence framework for cognitive analytic therapy. Psychol Psychother Theory Res Pract.

Kellett S, Easton K, Cooper M, Millings A, Simmonds-Buckley M, Parry G (2020) Evaluation of a Mobile App to Enhance Relational Awareness and Change During Cognitive Analytic Therapy: Mixed Methods CaseSeries. JMIR Ment Health 2020;7(12): e19888 URL: doi: 10.2196/19888

Parry, Glenys, and Dawn Bennett, ‘Competence in CAT’, in Laura Brummer, Marisol Cavieres, and Ranil Tan (eds), The Oxford Handbook of Cognitive Analytic Therapy (online edn, Oxford Academic, 19 May 2022),, accessed 1 Aug. 2022.