Overview
I qualified as a clinical psychologist from University College London (2008) and completed a post-graduate diploma in cognitive behavioural therapy (CBT) at the Institute of Psychiatry (2010). I have worked in various mental health services, including Improving Access to Psychological Therapies (IAPT)/NHS Talking Therapies services and secondary care services in London and Bristol. More recently I worked for the DClinPsych programme and Centre for Specialist Psychological Treatments of Anxiety and Related Problems at the University of Bath before joining the South Wales DClinPsych programme at Cardiff University and Cardiff and Vale UHB in 2021. I became the Programme Director for the MSc Clinical Associate in Applied Psychologist programme at Cardiff University in 2023.
My main clinical research interest is Hoarding Disorder, which includes understanding the inter-relationships between self, others and objects and, in addition, learning about people’s experiences of accessing and receiving support for hoarding difficulties. I’m also interested in autobiographical memory, in particular, intrusive memories and images.
Publication
2026
- Smith, A. et al. 2026. Beliefs about possessions associated with Hoarding Disorder: A systematic review and meta-analysis. Journal of Affective Disorders 395 120698. (10.1016/j.jad.2025.120698)
2025
- Marshall, C. , Hoshi, R. and Gregory, J. 2025. Parental expressed emotion and behavioural outcomes in autistic children and adolescents: A systematic review. Child Psychiatry and Human Development 56 , pp.1801-1823. (10.1007/s10578-023-01660-4)
- Maynard, H. et al. 2025. The role of suicidal mental imagery and experiential avoidance in suicidality: An exploratory study. Behavioural and Cognitive Psychotherapy 53 (2), pp.184-196. (10.1017/S1352465825000037)
- Parker, H. et al. 2025. Professionals’ and non-professionals’ experiences of working with people with hoarding disorder: a thematic synthesis. British Journal of Clinical Psychology (10.1111/bjc.70022)
- Stark, A. S. L. et al. 2025. A randomized controlled trial of self-help cognitive behavioural therapy for depression in adults with pulmonary hypertension. British Journal of Health Psychology 30 (3) e12800. (10.1111/bjhp.12800)
2024
- Maynard, H. et al. 2024. Psychological factors protecting against suicidality in older adults: A systematic review. Clinical Psychology and Psychotherapy 31 (4) e3029. (10.1002/cpp.3029)
- Ólafsdóttir Flóvenz, S. et al., 2024. Persistent physical symptoms and mental health problems among individuals seeking work rehabilitation. Nordic Psychology 76 (4), pp.534-547. (10.1080/19012276.2024.2342345)
- Twigger, D. et al., 2024. Psychosocial interventions for hoarding disorder: a systematic review. The Cognitive Behaviour Therapist 17 e41. (10.1017/S1754470X24000357)
2022
- Hillman, S. R. et al., 2022. The roles of intolerance of uncertainty, anxiety sensitivity and distress tolerance in hoarding disorder compared to OCD and healthy controls. Behavioural and Cognitive Psychotherapy 50 (4), pp.392-403. (10.1017/S1352465822000108)
- McKenzie, K. , Gregory, J. and Hogg, L. 2022. Mental health workers’ attitudes toward individuals with a diagnosis of borderline personality disorder: a systematic literature review. Journal of Personality Disorders 36 (1), pp.70-98. (10.1521/pedi_2021_35_528)
- Tinlin, R. M. et al., 2022. What is underneath all that stuff? A Q-methodological exploration of profiles of beliefs and vulnerabilities in hoarding disorder. Behavioural and Cognitive Psychotherapy 50 (5), pp.538-555. (10.1017/S1352465822000261)
2020
- Barry, T. J. et al., 2020. A multi-method comparison of autobiographical memory impairments amongst younger and older adults.. Aging and Mental Health 25 (5), pp.856-863. (10.1080/13607863.2020.1729338)
- Fiddick, L. et al., 2020. Referring to psychological therapy services in secondary NHS mental health services – how do mental health care professionals decide?. Mental Health Review Journal 25 (2), pp.185-196. (10.1108/MHRJ-04-2019-0013)
- Stewart, N. A. J. , Brewin, C. R. and Gregory, J. D. 2020. The role of intrusive imagery in hoarding disorder. Behavior Therapy 51 (1), pp.42-53. (10.1016/j.beth.2019.04.005)
2019
- Knight, R. et al., 2019. CBT with an adolescent with hoarding disorder—a single-case experimental design. International Journal of Cognitive Therapy 12 (2), pp.146-156. (10.1007/s41811-018-0033-x)
- Ryninks, K. , Wallace, V. and Gregory, J. D. 2019. Older adult hoarders’ experiences of being helped by volunteers and volunteers’ experiences of helping. Behavioural and Cognitive Psychotherapy 47 (6), pp.1-12. (10.1017/S135246581900016X)
2018
- Stephens, E. , Dysch, L. and Gregory, J. 2018. Diagnostic overshadowing of anxiety in Parkinson Disease: psychosocial factors and a cognitive-behavioral model. Cognitive And Behavioral Neurology 31 (3), pp.123-132. (10.1097/wnn.0000000000000161)
- Wilson, F. C. L. and Gregory, J. D. 2018. Overgeneral autobiographical memory and depression in older adults: a systematic review. Aging and Mental Health 22 (5), pp.575-586. (10.1080/13607863.2017.1326461)
2017
- Cooper, K. et al., 2017. Cognitive dehaviour therapy for health anxiety: a systematic review and meta-analysis. Behavioural and Cognitive Psychotherapy 45 (2), pp.110-123. (10.1017/s1352465816000527)
- Cowdrey, F. A. et al., 2017. Could a unified theory of cognition and emotion further the transdiagnostic perspective? A critical analysis using interacting cognitive subsystems as a case example. Journal of Experimental Psychopathology a4 (3), pp.377-399. (10.5127/pr.044714)
- Salkovskis, P. M. et al., 2017. The termination of checking and the role of just right feelings: a study of obsessional checkers compared with anxious and non-clinical controls. Behavioural and Cognitive Psychotherapy 45 (2), pp.139-155. (10.1017/s135246581600031x)
- Thew, G. R. et al., 2017. Self-critical thinking and overgeneralization in depression and eating disorders: an experimental study. Behavioural and Cognitive Psychotherapy 45 (5), pp.510-523. (10.1017/s1352465817000327)
- Thew, G. R. et al., 2017. The phenomenology of self-critical thinking in people with depression, eating disorders, and in healthy individuals. Psychology and Psychotherapy: Theory, Research and Practice 90 (4), pp.751-769. (10.1111/papt.12137)
2016
- Salkovskis, P. M. et al., 2016. Extending cognitive-behavioural theory and therapy to medically unexplained symptoms and long-term physical conditions: a hybrid transdiagnostic/problem specific approach. Behaviour Change 33 (4), pp.172-192. (10.1017/bec.2016.8)
2010
- Brewin, C. R. et al., 2010. Intrusive images in psychological disorders: characteristics, neural mechanisms, and treatment implications. Psychological Review 117 (1), pp.210-232. (10.1037/a0018113)
- Gregory, J. D. et al. 2010. Intrusive memories and images in bipolar disorder. Behaviour Research and Therapy 48 (7), pp.698-703. (10.1016/j.brat.2010.04.005)
Articles
- Barry, T. J. et al., 2020. A multi-method comparison of autobiographical memory impairments amongst younger and older adults.. Aging and Mental Health 25 (5), pp.856-863. (10.1080/13607863.2020.1729338)
- Brewin, C. R. et al., 2010. Intrusive images in psychological disorders: characteristics, neural mechanisms, and treatment implications. Psychological Review 117 (1), pp.210-232. (10.1037/a0018113)
- Cooper, K. et al., 2017. Cognitive dehaviour therapy for health anxiety: a systematic review and meta-analysis. Behavioural and Cognitive Psychotherapy 45 (2), pp.110-123. (10.1017/s1352465816000527)
- Cowdrey, F. A. et al., 2017. Could a unified theory of cognition and emotion further the transdiagnostic perspective? A critical analysis using interacting cognitive subsystems as a case example. Journal of Experimental Psychopathology a4 (3), pp.377-399. (10.5127/pr.044714)
- Fiddick, L. et al., 2020. Referring to psychological therapy services in secondary NHS mental health services – how do mental health care professionals decide?. Mental Health Review Journal 25 (2), pp.185-196. (10.1108/MHRJ-04-2019-0013)
- Gregory, J. D. et al. 2010. Intrusive memories and images in bipolar disorder. Behaviour Research and Therapy 48 (7), pp.698-703. (10.1016/j.brat.2010.04.005)
- Hillman, S. R. et al., 2022. The roles of intolerance of uncertainty, anxiety sensitivity and distress tolerance in hoarding disorder compared to OCD and healthy controls. Behavioural and Cognitive Psychotherapy 50 (4), pp.392-403. (10.1017/S1352465822000108)
- Knight, R. et al., 2019. CBT with an adolescent with hoarding disorder—a single-case experimental design. International Journal of Cognitive Therapy 12 (2), pp.146-156. (10.1007/s41811-018-0033-x)
- Marshall, C. , Hoshi, R. and Gregory, J. 2025. Parental expressed emotion and behavioural outcomes in autistic children and adolescents: A systematic review. Child Psychiatry and Human Development 56 , pp.1801-1823. (10.1007/s10578-023-01660-4)
- Maynard, H. et al. 2024. Psychological factors protecting against suicidality in older adults: A systematic review. Clinical Psychology and Psychotherapy 31 (4) e3029. (10.1002/cpp.3029)
- Maynard, H. et al. 2025. The role of suicidal mental imagery and experiential avoidance in suicidality: An exploratory study. Behavioural and Cognitive Psychotherapy 53 (2), pp.184-196. (10.1017/S1352465825000037)
- McKenzie, K. , Gregory, J. and Hogg, L. 2022. Mental health workers’ attitudes toward individuals with a diagnosis of borderline personality disorder: a systematic literature review. Journal of Personality Disorders 36 (1), pp.70-98. (10.1521/pedi_2021_35_528)
- Ólafsdóttir Flóvenz, S. et al., 2024. Persistent physical symptoms and mental health problems among individuals seeking work rehabilitation. Nordic Psychology 76 (4), pp.534-547. (10.1080/19012276.2024.2342345)
- Parker, H. et al. 2025. Professionals’ and non-professionals’ experiences of working with people with hoarding disorder: a thematic synthesis. British Journal of Clinical Psychology (10.1111/bjc.70022)
- Ryninks, K. , Wallace, V. and Gregory, J. D. 2019. Older adult hoarders’ experiences of being helped by volunteers and volunteers’ experiences of helping. Behavioural and Cognitive Psychotherapy 47 (6), pp.1-12. (10.1017/S135246581900016X)
- Salkovskis, P. M. et al., 2016. Extending cognitive-behavioural theory and therapy to medically unexplained symptoms and long-term physical conditions: a hybrid transdiagnostic/problem specific approach. Behaviour Change 33 (4), pp.172-192. (10.1017/bec.2016.8)
- Salkovskis, P. M. et al., 2017. The termination of checking and the role of just right feelings: a study of obsessional checkers compared with anxious and non-clinical controls. Behavioural and Cognitive Psychotherapy 45 (2), pp.139-155. (10.1017/s135246581600031x)
- Smith, A. et al. 2026. Beliefs about possessions associated with Hoarding Disorder: A systematic review and meta-analysis. Journal of Affective Disorders 395 120698. (10.1016/j.jad.2025.120698)
- Stark, A. S. L. et al. 2025. A randomized controlled trial of self-help cognitive behavioural therapy for depression in adults with pulmonary hypertension. British Journal of Health Psychology 30 (3) e12800. (10.1111/bjhp.12800)
- Stephens, E. , Dysch, L. and Gregory, J. 2018. Diagnostic overshadowing of anxiety in Parkinson Disease: psychosocial factors and a cognitive-behavioral model. Cognitive And Behavioral Neurology 31 (3), pp.123-132. (10.1097/wnn.0000000000000161)
- Stewart, N. A. J. , Brewin, C. R. and Gregory, J. D. 2020. The role of intrusive imagery in hoarding disorder. Behavior Therapy 51 (1), pp.42-53. (10.1016/j.beth.2019.04.005)
- Thew, G. R. et al., 2017. Self-critical thinking and overgeneralization in depression and eating disorders: an experimental study. Behavioural and Cognitive Psychotherapy 45 (5), pp.510-523. (10.1017/s1352465817000327)
- Thew, G. R. et al., 2017. The phenomenology of self-critical thinking in people with depression, eating disorders, and in healthy individuals. Psychology and Psychotherapy: Theory, Research and Practice 90 (4), pp.751-769. (10.1111/papt.12137)
- Tinlin, R. M. et al., 2022. What is underneath all that stuff? A Q-methodological exploration of profiles of beliefs and vulnerabilities in hoarding disorder. Behavioural and Cognitive Psychotherapy 50 (5), pp.538-555. (10.1017/S1352465822000261)
- Twigger, D. et al., 2024. Psychosocial interventions for hoarding disorder: a systematic review. The Cognitive Behaviour Therapist 17 e41. (10.1017/S1754470X24000357)
- Wilson, F. C. L. and Gregory, J. D. 2018. Overgeneral autobiographical memory and depression in older adults: a systematic review. Aging and Mental Health 22 (5), pp.575-586. (10.1080/13607863.2017.1326461)
Biography
Programme Director MSc Clinical Associate in Applied Psychology - Cardiff University
Senior Clinical Tutor/Senior Lecturer (Hons) - Cardiff University
Professional memberships
BABCP accredited
HCPC registered
Fellow of the Higher Education Academy (FHEA)
Academic positions
Research Tutor/Lecturer - University of Bath
Committees and reviewing
Member of the BABCP's National Conference Programme Advisory Group
Associate Editor - Bahavioural and Cognitive Psychotherapy