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
2025
- Maynard, H., Gregory, J. D., Davies, A. and Fox, J. 2025. The role of suicidal mental imagery and experiential avoidance in suicidality: An exploratory study. Behavioural and Cognitive Psychotherapy
2024
- Twigger, D., Gregory, J. D., Bowers, E. and Millar, J. 2024. Psychosocial interventions for hoarding disorder: a systematic review. The Cognitive Behaviour Therapist 17, article number: e41. (10.1017/S1754470X24000357)
- Ólafsdóttir Flóvenz, S., M. Salkovskis, P., Gregory, J. D., Valdimarsdóttir, H., Sigurðsson, E. and Friðrik Sigurðsson, J. 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)
- Maynard, H., Gregory, J. D., Davies, A. and Fox, J. 2024. Psychological factors protecting against suicidality in older adults: A systematic review. Clinical Psychology and Psychotherapy 31(4), article number: e3029. (10.1002/cpp.3029)
- Marshall, C., Hoshi, R. and Gregory, J. 2024. Parental expressed emotion and behavioural outcomes in autistic children and adolescents: A systematic review. Child Psychiatry and Human Development (10.1007/s10578-023-01660-4)
2022
- Tinlin, R. M., Beckwith, H., Gregory, J. D. and Lomax, C. L. 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)
- Hillman, S. R., Lomax, C. L., Khaleel, N., Smith, T. R. and Gregory, J. D. 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)
2020
- Fiddick, L., Neale, E., Nathwani, F., Bennert, K. and Gregory, J. 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)
- Barry, T. J., Gregory, J. D., Latorre, J. M., Ros, L., Nieto, M. and Ricarte, J. J. 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)
- 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
- 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)
- Knight, R., Davies, R., Salkovskis, P. M. and Gregory, J. D. 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)
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
- Thew, G. R., Gregory, J. D., Roberts, K. and Rimes, K. A. 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)
- Thew, G. R., Gregory, J. D., Roberts, K. and Rimes, K. A. 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)
- Cowdrey, F. A., Lomax, C., Gregory, J. D. and Barnard, P. J. 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)
- Cooper, K., Gregory, J. D., Walker, I., Lambe, S. and Salkovskis, P. M. 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)
- Salkovskis, P. M., Millar, J., Gregory, J. D. and Wahl, K. 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)
2016
- Salkovskis, P. M., Gregory, J. D., Sedgwick-Taylor, A., White, J., Opher, S. and Ólafsdóttir, S. 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
- Gregory, J. D., Brewin, C. R., Mansell, W. and Donaldson, C. 2010. Intrusive memories and images in bipolar disorder. Behaviour Research and Therapy 48(7), pp. 698-703. (10.1016/j.brat.2010.04.005)
- Brewin, C. R., Gregory, J. D., Lipton, M. and Burgess, N. 2010. Intrusive images in psychological disorders: characteristics, neural mechanisms, and treatment implications. Psychological Review 117(1), pp. 210-232. (10.1037/a0018113)
Articles
- Maynard, H., Gregory, J. D., Davies, A. and Fox, J. 2025. The role of suicidal mental imagery and experiential avoidance in suicidality: An exploratory study. Behavioural and Cognitive Psychotherapy
- Twigger, D., Gregory, J. D., Bowers, E. and Millar, J. 2024. Psychosocial interventions for hoarding disorder: a systematic review. The Cognitive Behaviour Therapist 17, article number: e41. (10.1017/S1754470X24000357)
- Ólafsdóttir Flóvenz, S., M. Salkovskis, P., Gregory, J. D., Valdimarsdóttir, H., Sigurðsson, E. and Friðrik Sigurðsson, J. 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)
- Maynard, H., Gregory, J. D., Davies, A. and Fox, J. 2024. Psychological factors protecting against suicidality in older adults: A systematic review. Clinical Psychology and Psychotherapy 31(4), article number: e3029. (10.1002/cpp.3029)
- Marshall, C., Hoshi, R. and Gregory, J. 2024. Parental expressed emotion and behavioural outcomes in autistic children and adolescents: A systematic review. Child Psychiatry and Human Development (10.1007/s10578-023-01660-4)
- Tinlin, R. M., Beckwith, H., Gregory, J. D. and Lomax, C. L. 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)
- Hillman, S. R., Lomax, C. L., Khaleel, N., Smith, T. R. and Gregory, J. D. 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)
- Fiddick, L., Neale, E., Nathwani, F., Bennert, K. and Gregory, J. 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)
- Barry, T. J., Gregory, J. D., Latorre, J. M., Ros, L., Nieto, M. and Ricarte, J. J. 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)
- 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)
- 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)
- Knight, R., Davies, R., Salkovskis, P. M. and Gregory, J. D. 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)
- 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)
- Thew, G. R., Gregory, J. D., Roberts, K. and Rimes, K. A. 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)
- Thew, G. R., Gregory, J. D., Roberts, K. and Rimes, K. A. 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)
- Cowdrey, F. A., Lomax, C., Gregory, J. D. and Barnard, P. J. 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)
- Cooper, K., Gregory, J. D., Walker, I., Lambe, S. and Salkovskis, P. M. 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)
- Salkovskis, P. M., Millar, J., Gregory, J. D. and Wahl, K. 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)
- Salkovskis, P. M., Gregory, J. D., Sedgwick-Taylor, A., White, J., Opher, S. and Ólafsdóttir, S. 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)
- Gregory, J. D., Brewin, C. R., Mansell, W. and Donaldson, C. 2010. Intrusive memories and images in bipolar disorder. Behaviour Research and Therapy 48(7), pp. 698-703. (10.1016/j.brat.2010.04.005)
- Brewin, C. R., Gregory, J. D., Lipton, M. and Burgess, N. 2010. Intrusive images in psychological disorders: characteristics, neural mechanisms, and treatment implications. Psychological Review 117(1), pp. 210-232. (10.1037/a0018113)
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