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All Outputs (260)

Shame- and guilt-proneness as mediators of PTSD/DSO symptoms in young adults (2025)
Journal Article
Oasi, O., Shevlin, M., Lasalvia, A., Bonetto, C., Cristofalo, D., Marzocco, G., Somma, C., Toscano, M., Karatzias, T., & Cavalera, C. (in press). Shame- and guilt-proneness as mediators of PTSD/DSO symptoms in young adults. Clinical Psychology and Psychotherapy,

The aim of the study was to investigate the relationships between trauma exposure, shame- and guilt-proneness, and the development of PTSD and Disturbances in Self-Organization (DSO) symptoms in young adults. Specifically, we hypothesized that trauma... Read More about Shame- and guilt-proneness as mediators of PTSD/DSO symptoms in young adults.

Accelerating the development of a psychological intervention to restore treatment decision-making capacity in patients with schizophrenia-spectrum disorder: An umbrella trial (2025)
Journal Article
Hutton, P., Taylor, C. D., Kelly, J., Emsley, R., Vikram, A., Alexander, C. H., McCann, A., Saddington, D., Eliasson, E., Burke, J., Harper, S., Karatzias, T., Taylor, P. J., Watson, A., Dougall, N., Stavert, J., O'Rourke, S., Glasgow, A., Murphy, R., Palmer, K., …Woodrow, A. (2025). Accelerating the development of a psychological intervention to restore treatment decision-making capacity in patients with schizophrenia-spectrum disorder: An umbrella trial. Schizophrenia Research, 282, 184-197. https://doi.org/10.1016/j.schres.2025.06.018

Introduction
Many individuals with schizophrenia-spectrum disorder (‘psychosis’) lack capacity to make decisions about psychiatric treatment (‘incapacity’), however we lack robust evidence from clinical trials on interventions to improve it. To acce... Read More about Accelerating the development of a psychological intervention to restore treatment decision-making capacity in patients with schizophrenia-spectrum disorder: An umbrella trial.

Positive Symptoms of Psychosis and International Classification of Diseases 11th Revision (ICD-11) Complex Post-traumatic Stress Disorder: A Network Analysis in a Canadian Sample from Montreal (2025)
Journal Article
Levin, Y., Mazza, A., Hyland, P., Karatzias, T., Shevlin, M., McGinty, G., Hoffman, Y., Lis, E., Ben-Ezra, M., & Rahel, B. (2025). Positive Symptoms of Psychosis and International Classification of Diseases 11th Revision (ICD-11) Complex Post-traumatic Stress Disorder: A Network Analysis in a Canadian Sample from Montreal. Canadian Journal of Psychiatry / Revue Canadienene de Psychiatrie, 70(7), 583-592. https://doi.org/10.1177/07067437251337645

Objectives: Traumatic experiences constitute a risk factor for developing different psychopathologies, such as post-traumatic stress disorder (PTSD), complex post-traumatic stress disorder (CPTSD), and positive symptoms of psychosis. However, on the... Read More about Positive Symptoms of Psychosis and International Classification of Diseases 11th Revision (ICD-11) Complex Post-traumatic Stress Disorder: A Network Analysis in a Canadian Sample from Montreal.

The International Trauma Interview (ITI): development of a semi-structured diagnostic interview and evaluation in a UK sample (2025)
Journal Article
Roberts, N. P., Hyland, P., Fox, R., Roberts, A., Lewis, C., Cloitre, M., Brewin, C. R., Karatzias, T., Shevlin, M., Gelezelyte, O., Bondjers, K., Fresno, A., Souch, A., & Bisson, J. I. (2025). The International Trauma Interview (ITI): development of a semi-structured diagnostic interview and evaluation in a UK sample. European Journal of Psychotraumatology, 16(1), Article 2494361. https://doi.org/10.1080/20008066.2025.2494361

Background: The International Trauma Interview (ITI) is a structured clinician-administered measure developed to assess posttraumatic stress disorder (PTSD) and complex PTSD (CPTSD) as defined in the 11th version of the International Classification o... Read More about The International Trauma Interview (ITI): development of a semi-structured diagnostic interview and evaluation in a UK sample.

The structure of Benevolent Childhood Experiences: A latent class analysis and association with mental health outcomes and psychological factors in a large adult UK sample (2025)
Journal Article
Zagaria, A., Karatzias, T., Hyland, P., & Shevlin, M. (2025). The structure of Benevolent Childhood Experiences: A latent class analysis and association with mental health outcomes and psychological factors in a large adult UK sample. Adversity and Resilience Science, 6(2), 123-137. https://doi.org/10.1007/s42844-025-00167-2

The aims of this study were firstly to explore the relationship between Benevolent Childhood Experiences (BCEs) and demographic variables, secondly to investigate the taxonic structure of BCEs without considering the confounding effect of Adverse Chi... Read More about The structure of Benevolent Childhood Experiences: A latent class analysis and association with mental health outcomes and psychological factors in a large adult UK sample.

Testing the Use of “Clinical Checks” With the International Trauma Questionnaire to Measure PTSD and Complex PTSD (2025)
Journal Article
Shevlin, M., Hyland, P., Brewin, C. R., Cloitre, M., Karatzias, T., & Redican, E. (2025). Testing the Use of “Clinical Checks” With the International Trauma Questionnaire to Measure PTSD and Complex PTSD. Acta Psychiatrica Scandinavica, 152(1), 49-59. https://doi.org/10.1111/acps.13799

Background: The International Trauma Questionnaire (ITQ) is the most widely used measure of ICD-11 Posttraumatic Stress Disorder (PTSD) and Complex PTSD (CPTSD). This self-report scale has been used to estimate prevalence rates of these disorders in... Read More about Testing the Use of “Clinical Checks” With the International Trauma Questionnaire to Measure PTSD and Complex PTSD.

Are ‘time’ and ‘culture’ useful and necessary diagnostic requirements for ICD-11 Prolonged Grief Disorder? A Cross-national study (2025)
Journal Article
Redican, E., Shevlin, M., Ben-Ezra, M., Karatzias, T., & Hyland, P. (online). Are ‘time’ and ‘culture’ useful and necessary diagnostic requirements for ICD-11 Prolonged Grief Disorder? A Cross-national study. Death Studies, https://doi.org/10.1080/07481187.2025.2468822

ICD-11 PGD can only be diagnosed if symptoms persist beyond 6 months after bereavement and for longer than would be expected from societal, cultural, or religious norms. This study examined the validity and utility of these diagnostic requirements us... Read More about Are ‘time’ and ‘culture’ useful and necessary diagnostic requirements for ICD-11 Prolonged Grief Disorder? A Cross-national study.

Experiences of Social Disconnection in a Bereaved Community Sample from Ontario, Canada (2025)
Journal Article
Nolan, E., Redican, E., Hyland, P., Duffy, M., Karatzias, T., & Shevlin, M. (online). Experiences of Social Disconnection in a Bereaved Community Sample from Ontario, Canada. Journal of Loss and Trauma, https://doi.org/10.1080/15325024.2025.2465392

Lower perceived social support is a known risk factor for problematic grief reactions, but specific facets such as social disconnection may play a critical role in shaping grief responses. This study utilized the Oxford-Grief Social Disconnection Sca... Read More about Experiences of Social Disconnection in a Bereaved Community Sample from Ontario, Canada.

Complex PTSD and identification with the aggressor among survivors of childhood abuse (2024)
Journal Article
Lahav, Y., Cloitre, M., Hyland, P., Shevlin, M., Ben-Ezra, M., & Karatzias, T. (2025). Complex PTSD and identification with the aggressor among survivors of childhood abuse. Child Abuse and Neglect, 160, Article 107196. https://doi.org/10.1016/j.chiabu.2024.107196

Background: Childhood abuse (CA) is a risk factor for trauma-related disorders including posttraumatic stress disorder (PTSD) and complex posttraumatic stress disorder (CPTSD). This severe form of interpersonal trauma may result in "identification wi... Read More about Complex PTSD and identification with the aggressor among survivors of childhood abuse.

The psychological burden of bereavement in the general population of UK and Ireland (2024)
Journal Article
Redican, E., Shevlin, M., Hyland, P., Murphy, J., Duffy, M., & Karatzias, T. (online). The psychological burden of bereavement in the general population of UK and Ireland. Death Studies, https://doi.org/10.1080/07481187.2024.2420877

This study examined the experiences of loss among bereaved adults, and the association between loss-related factors and mental health outcomes. Participants were 2023 bereaved adults from the United Kingdom and Ireland who completed measures of their... Read More about The psychological burden of bereavement in the general population of UK and Ireland.

How do you become resilient? A critical realist explanation of the youth resilience process (2024)
Journal Article
Ho, G. W. K., Leung, D. Y. L., Chan, A. C. Y., Bressington, D. T., & Karatzias, T. (2025). How do you become resilient? A critical realist explanation of the youth resilience process. Adversity and Resilience Science, 6(2), 105-121. https://doi.org/10.1007/s42844-024-00154-z

Adversities serve as risks, but also opportunities to acquire capacities to adjust positively in future stressors. There is now considerable agreement that resilience should be viewed as a process. However, a key question remains: Why do some individ... Read More about How do you become resilient? A critical realist explanation of the youth resilience process.

Hierarchical Network Structure: A Novel Approach to Conceptualising ICD-11 Complex PTSD using a general population sample from Africa (2024)
Journal Article
Robinson, M., Levin, Y., Hyland, P., Karatzias, T., & Ben-Ezra, M. (2025). Hierarchical Network Structure: A Novel Approach to Conceptualising ICD-11 Complex PTSD using a general population sample from Africa. Journal of Affective Disorders, 369, 813-818. https://doi.org/10.1016/j.jad.2024.10.015

Background
Investigations have sought to model the structure of ICD-11 Complex PTSD (CPTSD) using factor analytic models, finding support for higher-order domains representing PTSD and Disturbances in Self Organisation (DSO). Network analysis has a... Read More about Hierarchical Network Structure: A Novel Approach to Conceptualising ICD-11 Complex PTSD using a general population sample from Africa.

Do Psychological Treatments for PTSD in Children and Young People Reduce Trauma- Related Appraisals? A Systematic Review and Meta-Analysis (2024)
Journal Article
Smith, C., Ford, C., Baldwin, G., Jensen, T. K., Karatzias, T., Skogbrott Birkeland, M., & Meiser-Stedman, R. (2024). Do Psychological Treatments for PTSD in Children and Young People Reduce Trauma- Related Appraisals? A Systematic Review and Meta-Analysis. Behaviour Research and Therapy, 182, Article 104621. https://doi.org/10.1016/j.brat.2024.104621

Research is increasingly highlighting the role of negative trauma-related appraisals in child and adolescent post-traumatic stress disorder (PTSD). The cognitive model of PTSD claims that an essential mechanism of treatment is a reduction in these ap... Read More about Do Psychological Treatments for PTSD in Children and Young People Reduce Trauma- Related Appraisals? A Systematic Review and Meta-Analysis.

Self-harm, suicide, and ICD-11 complex posttraumatic stress disorder in treatment-seeking adolescents with major depression (2024)
Journal Article
Liu, H., Ho, G. W., Karatzias, T., Shevlin, M., Wong, K. H., & Hyland, P. (2024). Self-harm, suicide, and ICD-11 complex posttraumatic stress disorder in treatment-seeking adolescents with major depression. Journal of Child and Adolescent Trauma, 17(4), 1057-1066. https://doi.org/10.1007/s40653-024-00655-0

Posttraumatic stress disorder (PTSD) is linked with self-harm and suicide, but few studies have examined these severe outcomes in relation to complex trauma. This study examined the associations between self-harm and suicide-related phenomena with IC... Read More about Self-harm, suicide, and ICD-11 complex posttraumatic stress disorder in treatment-seeking adolescents with major depression.

Assessing Self-Reported Prolonged Grief Disorder with ‘Clinical Checks’: A Proof of Principle Study (2024)
Journal Article
Shevlin, M., Hyland, P., Cloitre, M., Brewin, C., Martsenkovskyi, D., Ben-Ezra, M., Bondjers, K., Karatzias, T., Duffy, M., & Redican, E. (2025). Assessing Self-Reported Prolonged Grief Disorder with ‘Clinical Checks’: A Proof of Principle Study. Journal of Traumatic Stress, 38(1), 174-180. https://doi.org/10.1002/jts.23100

Psychological assessment is commonly conducted using either self-report measures or clinical interviews; the former are quick and easy to administer, and the later are more time consuming and require training. Self-report measures have been criticise... Read More about Assessing Self-Reported Prolonged Grief Disorder with ‘Clinical Checks’: A Proof of Principle Study.

Physical, mental, and behavioral health after adverse and benevolent childhood experiences: a comparison of two adversity conceptualizations (2024)
Journal Article
Ho, G. W., Ling Chan, K., Ho Wong, K., Fong Leung, S., & Karatzias, T. (online). Physical, mental, and behavioral health after adverse and benevolent childhood experiences: a comparison of two adversity conceptualizations. Psychological Trauma: Theory, Research, Practice, and Policy, https://doi.org/10.1037/tra0001732

Objective: Adverse and benevolent childhood experiences (ACEs, BCEs) impact health across the lifespan. No known study has investigated these associations across different health domains using a representative adult sample. This study examined the as... Read More about Physical, mental, and behavioral health after adverse and benevolent childhood experiences: a comparison of two adversity conceptualizations.

Testing the distinctiveness of prolonged grief disorder from posttraumatic stress disorder and depression in large bereaved community samples. (2024)
Journal Article
Shevlin, M., Redican, E., Karatzias, T., & Hyland, P. (in press). Testing the distinctiveness of prolonged grief disorder from posttraumatic stress disorder and depression in large bereaved community samples. Journal of Affective Disorders Reports, 363, 214-220. https://doi.org/10.1016/j.jad.2024.07.127

Background: This study sought to test the distinctiveness of symptoms of prolonged grief disorder (PGD) from posttraumatic stress disorder (PTSD) and depression.
Methods: Confirmatory factor analysis (CFA) and target exploratory factor analysis (EF... Read More about Testing the distinctiveness of prolonged grief disorder from posttraumatic stress disorder and depression in large bereaved community samples..

Severe dissociative experiences beyond detachment in a large clinical sample of inpatients with PTSD: Diagnostic and treatment implications (2024)
Journal Article
Kratzer, L., Tschöke, S., Schröder, J., Shevlin, M., Hyland, P., Eckenberger, C., Heinz, P., & Karatzias, T. (2024). Severe dissociative experiences beyond detachment in a large clinical sample of inpatients with PTSD: Diagnostic and treatment implications. Psychopathology, 57(6), 519-527. https://doi.org/10.1159/000539740

Introduction: The fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5; American Psychiatric Association, 2013) contains a dissociative subtype of post-traumatic stress disorder (PTSD) characterized by depersonalization a... Read More about Severe dissociative experiences beyond detachment in a large clinical sample of inpatients with PTSD: Diagnostic and treatment implications.

Development and validation of the caregiver-report version of the international grief questionnaire (IGQ-CG): Results from a Ukrainian sample of parents (2024)
Journal Article
Redican, E., Shevlin, M., Hyland, P., Karatzias, T., Martsenkovskyi, D., & Ben-Ezra, M. (2024). Development and validation of the caregiver-report version of the international grief questionnaire (IGQ-CG): Results from a Ukrainian sample of parents. Clinical Child Psychology and Psychiatry, 29(4), 1481-1496. https://doi.org/10.1177/13591045241260897

The International Grief Questionnaire (IGQ) is a self-report measure of ICD-11 Prolonged Grief Disorder (PGD) in adults. This study sought to develop and validate a caregiver-report version of the IGQ for children and adolescents aged 7–17 years; the... Read More about Development and validation of the caregiver-report version of the international grief questionnaire (IGQ-CG): Results from a Ukrainian sample of parents.