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Student section
Student section leader: Dan Jenkins, Stellenbosch University, South Africa

Chalkboard with Different Languages

Student projects committee

Dan Jenkins, Stellenbosch University, South Africa University, South Africa (Chair)

Yuhang Zhu - representing Asia

Katherine Soto - representing South America

Engida Girma Gebiso - representing Africa

Heike Arzapalo - representing Europe

Krithika Prakash - representing North America and Australia/New Zealand areas


The Global Collaboration on Traumatic Stress emphasizes the importance to bring together trainees, graduate students, medical residents or post-docs across the world to work together on topic of global importance. Students are the future!

Therefore we aim to have students actively involved in the global collaboration, on any theme.

Student projects are projects run by students. Needless to say, students are also very welcome to participate in other projects as well. Check out the different themes and topics.

Current student projects can be found below. If you have ideas or suggestions please email Dan Jenkins,.

1. ​Paper in a Day Projects (PIAD)

For early career researchers there is a unique opportunity to collaborate with international colleagues on existing data and to write a manuscript to be submitted for publication ‘in a day’.

Check this page for new PIADs and/or register to receive the announcements through the newsletter.

Upcoming PIADs


  • September 2024

Paper in a Day (PIAD) will be held at the International Society for Traumatic Stress Studies’ 40th Annual Meeting in Boston on Wednesday September 25th. This year’s PIAD will feature two projects using FAIR datasets, considering

(1) sleep and trauma symptoms among emergency medical service workers and

(2) prolonged grief disorder symptoms among people experiencing non-traumatic and traumatic loss.


More information soon.

Past PIADs

  • December 2023

PIAD Cape Town - 12 December 2023

At the 1st Global Collaboration on Traumatic Stress Conference in Cape Town a Paper-In-A-Day (PIAD) workshop was held on 12 December at Stellenbosch University Faculty of Medicine and Health Sciences. The idea for Paper-In-A-Day was developed by Eva Alisic and first pioneered at an International Society for Traumatic Stress Studies annual meeting. The initiative brings together junior researchers to work together on a defined project that can be submitted for publication. The full-day in-person workshop, led by Jacqueline Womersley and Muneeb Salie of Stellenbosch University, brought together a diverse group to work on a systematic review on early biological psychosocial mechanisms of posttraumatic stress disorder onset and persistence in youth. The six participants represented three countries (South Africa, Botswana, and Nigeria); different backgrounds (basic scientists and clinicians) and varying levels of research experience (postgraduate students, postdoctoral fellows, lecturers, and clinicians). The success of the workshop was thanks to the enthusiasm and hard work of the participants, as well as Eva Alisic, who joined the in-person meeting to share insight into the process and exciting new approaches to collaborative work and brainstorming. The GCTS PIAD laid the groundwork for collaboration and teamwork among an upcoming generation of African researchers. Follow-up work and meetings in 2024 are already in full swing with the review starting to take shape!

  • November 2023

Gender Differences in DSM-5 PTSD Symptom Clusters: A Network Analysis

Project leaders: Anke Witteveen & Mirjam van Zuiden 

A successful Paper in a Day project was held at ISTSS in Los Angeles on November 1st 2023 and embodied global collaboration and FAIR data. Early career researchers from around the world collaborated to conduct network analyses using data made available by one of the PIAD leaders’ research project on early prevention of PTSD after trauma. The group included 7 participants from Singapore, Norway, Ghana, and the United States and two supervisors from the Netherlands. 


Data from the 2-ASAP study in the Netherlands, provided the starting point for interesting new work to examine gender impact of trauma exposure search paper on differences in early post-trauma PTSD symptom network structures between women and men. 

Project: Gender Differences in DSM-5 PTSD Symptom Clusters: A Network Analysis

More details here.

  • November 2022

Two successful Paper in a Day projects embodied global collaboration and FAIR data in action at ISTSS in Atlanta. Early career researchers and trainees from around the world collaborated to conduct novel analyses using accessible data resources made available through the Global Collaboration and its projects. The two project groups included 17 participants from 10 countries (Australia, the Czech Republic, Germany, Israel, Korea, Mongolia, the Netherlands, Norway, United Kingdom, and United States).

In both projects, easily accessible data resources, from studies conducted in multiple countries, provided the starting point for interesting new work to examine the impact of trauma exposure.

An Exploration of Trauma-Related Symptoms and Symptom Patterns Across the World  

Project leaders:  Hope Christie & Anke de Haan 

Using openly available data from the Global Collaboration’s Global Psychotrauma Screen project. 

Resulting paper:

  • Haering, S., Kooistra, M. J., Bourey, C., Chimed-Ochir, U., Doubková, N., Hoeboer, C. M., … de Haan, A. (2024). Exploring transdiagnostic stress and trauma-related symptoms across the world: a latent class analysis. European Journal of Psychotraumatology, 15(1).

A Qualitative Analysis of the role of PTSD and PTG in Family Experiences of having a relative in Vegetative and Minimally Conscious States

Project leaders: Anna Denejkina and Yaara Sadeh 

Using accessible multi-study data from the Child Trauma Data Archives project (part of the FAIR Data theme).

Resulting paper:

  • Sadeh, Y., Graham, L., Curtis, M., Janson, M., Kim, J., Schwartz, A., … Denejkina, A. (2024). Posttraumatic stress and depression symptom classes in parents of trauma-exposed children: a transdiagnostic perspective using pooled individual participant data. European Journal of Psychotraumatology, 15(1).

2. Global Perspectives on Culturally Sensitive Trauma Training
Project leader: Krithika Prakash, Eastern Michigan University, Michigan, US



Bring together a team of student researchers across the world with the goal of understanding the quality of culturally sensitive trauma training provided to them, and answer the following questions: ...


3. GPS-Age

Age of trauma exposure and its transdiagnostic consequences: Findings from the Global Psychotrauma Screen


Project leader: Dan JenkinsStellenbosch University, South Africa University, South Africa

Project group: Teresa Pirro, McGill University, Canada; Leslyette Chevez, Regent University, USA; Vaitsa Giannouli, Hellenic Open University, Greece; Victoria von Rheinbaben, LMU Munich, Germany; GCTS Student Section. 

Currently looking for collaborators, please contact the project leader if interested.


The experience of trauma can have a lifelong impact on an individual’s mental and physical health (Bethell et al., 2014). The extent to which traumatic experiences affect later symptoms is not, however, solely dependent on the type of event itself, but also on characteristics such as unemployment, the presence of psychiatric symptoms pre-exposure, and age at time of exposure (Xiong et al., 2020). Age of exposure to a traumatic event is of particular interest to understanding the development of trauma-related symptoms due to traumatic events’ propensity to happen at any time, including during vulnerable developmental periods (De Young et al., 2011). 



Various studies (e.g., Koenen et al., 2017; Xiong et al., 2020) have identified lower age at exposure as a risk factor for the development of trauma-related symptoms, but few have sought to explore the nature of this relationship in detail. This project aims to establish whether the relationship between trauma exposure and the severity of traumatic symptoms (as measured by the GPS [Global Psychotrauma Screen]) is moderated by age of exposure or duration of exposure to these traumatic events, and whether this moderation holds across different measured trauma types and different geographical regions. 



Using existing FAIR data (Kassam-Adams & Olff, 2020; Olff, 2020) collected in previous studies on the GPS (Olff et al., 2020, 2021), this quantitative project will involve a secondary analysis of adults’ GPS data (N = 10,299) to ascertain whether age of exposure is significantly implicated in the relationship between trauma exposure and symptom severity.

To identify the impact of stressful events on trauma symptoms, linear regression analyses will be conducted with the GPS total scores as dependent variables. These analyses will include the type of event, age at first exposure, duration of exposure, and other covariates as independent variables. Interaction terms between both the type of event and geographical region and both age at first exposure and duration of exposure will be included to examine potential moderation effects. To add nuance to this information, we will also compare stressful events across the subdomains of the GPS using binomial generalised linear models. These models will have one-item GPS subdomains as dependent variables and will incorporate the type of event, age at first exposure, duration of exposure, and covariates as independent variables, along with the relevant interaction terms.

All analysis will be conducted in R using RStudio (R Core Team, 2021; RStudio Team, 2020) with significance values set to .05.



  • Bethell, C. D., Newacheck, P., Hawes, E., & Halfon, N. (2014). Adverse Childhood Experiences: Assessing The Impact On Health And School Engagement And The Mitigating Role Of Resilience. Health Affairs, 33(12), 2106–2115.

  • De Young, A. C., Kenardy, J. A., & Cobham, V. E. (2011). Trauma in Early Childhood: A Neglected Population. Clinical Child and Family Psychology Review, 14(3), 231–250.

  • Kassam-Adams, N., & Olff, M. (2020). Embracing data preservation, sharing, and re-use in traumatic stress research. European Journal of Psychotraumatology, 11(1), 1739885.

  • Koenen, K. C., Ratanatharathorn, A., Ng, L., McLaughlin, K. A., Bromet, E. J., Stein, D. J., Karam, E. G., Meron Ruscio, A., Benjet, C., Scott, K., Atwoli, L., Petukhova, M., Lim, C. C. W., Aguilar-Gaxiola, S., Al-Hamzawi, A., Alonso, J., Bunting, B., Ciutan, M., De Girolamo, G., … Kessler, R. C. (2017). Posttraumatic stress disorder in the World Mental Health Surveys. Psychological Medicine, 47(13), 2260–2274.

  • Olff, M. (2020). To share or not to share – 10 years of European Journal of Psychotraumatology. European Journal of Psychotraumatology, 11(1), 1844955.

  • Olff, M., Bakker, A., Frewen, P., Aakvaag, H., Ajdukovic, D., Brewer, D., Elmore Borbon, D. L., Cloitre, M., Hyland, P., Kassam-Adams, N., & others. (2020). Screening for consequences of trauma–an update on the global collaboration on traumatic stress. European Journal of Psychotraumatology, 11(1), 1752504.

  • Olff, M., Primasari, I., Qing, Y., Coimbra, B. M., Hovnanyan, A., Grace, E., Williamson, R. E., Hoeboer, C. M., & Consortium, T. G.-C. (2021). Mental health responses to COVID-19 around the world. European Journal of Psychotraumatology, 12(1), 1929754.

  • R Core Team. (2021). R: A Language and Environment for Statistical Computing. R Foundation for Statistical Computing.

  • RStudio Team. (2020). RStudio: Integrated Development for R [Computer software].

  • Xiong, J., Lipsitz, O., Nasri, F., Lui, L. M. W., Gill, H., Phan, L., Chen-Li, D., Iacobucci, M., Ho, R., Majeed, A., & McIntyre, R. S. (2020). Impact of COVID-19 pandemic on mental health in the general population: A systematic review. Journal of Affective Disorders, 277, 55–64.

Join the student committee

We, at the Global Collaboration, are interested in recruiting student leaders from various countries who will have a chance to conduct research and collaborate with other students and faculty in conducting research on topics of global importance.

We are looking to create a student committee who will act as a liaison between students and the GCTS steering committee and oversee all student projects.

If you are interested in being part of this committee, please email Krithika Prakash.


Please spread the news about this initiative to students who you believe might be a good fit for the committee. If you have any further questions or concerns, please reach out to Krithika Prakash

piad cape town.png

Congratulations to Dany Laure Wadji 

    for winning the second prize for a

              poster on GCTS project:

        Child maltreatment through a

            cross-cultural lens (CM-CCL)

"Associations entre expériences de maltraitance dans l'enfance et acceptabilité perçue de la maltraitance envers enfants: Une étude interculturelle exploratoire"

by Dany Laure Wadji, Misari Oe, Polly Cheng, Eleonora Bartoli, Chantal Martin-Soelch, Monique, C. Pfaltz, Rachel Langevin.

The poster was presented at the 11th Congress on Child and Adolescent AbuseMontréal, October 2023.
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