Global Psychotrauma Screen (GPS) User Guide.png

Global Psychotrauma Screen

The GPS in short

  • The Global Psychotrauma Screen (GPS) is a screening instrument designed to identify reactions to a severe stressor or potentially traumatic event (17 yes/no questions).

  • It also assesses risk or protective factors known to influence the course of symptoms (5 yes/no questions).

  • The GPS begins with questions about the event or experience.

  • It can be used in different settings such as in primary care, after disaster, or in clinical practice.

  • The app provides direct feedback on the scores.

  • Scoring positive above the cutoff or on certain domains (e.g. of PTSD, anxiety or depression - see below) may require more detailed follow assessments, e.g. with structured interviews for specific disorders.

  • Take the GPS here (

Paper in a Day Project: An Exploration of Trauma-Related Symptoms and Symptom Patterns Across the World  

If you are a student or early career researcher please read more here.



The GPS is currently available in the languages below. Take the GPS app version, or download the pdf, or listen to audio version.

Please note that some (African) languages are widely spoken across different countries and there might be instances the terminology may suit one country better than another. Please contact us if a specific country version is required.


Background and aims

The GPS was developed by an international group of experts representing traumatic stress societies worldwide, called the Global Collaboration on Traumatic Stress (Olff et al., 2020; Schnyder et al., 2017). The aim was to address the need for a brief instrument that would tap the potential wide range of acute or long term consequences of  stressful or potentially trauma events, broader than PTSD symptoms alone (see domains below). It can be applied to tap the consequences of all types of events including more recent ones. 

The GPS consists of 17 symptom items, and 5 risk/protective factor questions, each to be answered in a yes/no format.


​The symptom domains covered in the GPS are:

  • PTSD

  • Disturbances in Self-Organization (DSO) as part of Complex PTSD

  • Anxiety

  • Depression

  • Sleep problems

  • Self-harm

  • Dissociation

  • Other physical, emotional or social problems

  • Substance abuse

Risk and protective factors assessed are:

  • Other stressful events

  • Childhood trauma

  • History of mental illness

  • Social support

  • Psychological resilience

The English version has been translated into the languages listed above following the translation and cultural adaptation process by Sousa and Rojjanasrirat (2011) or similar.

Norm scores and psychometric properties

Ongoing research suggests good internal reliability as well as concurrent validity with instruments measuring a range of psychotrauma related symptom domains (Olff et al., 2020; Oe et al., 2020; Rossi et al., 2020; Rossi et al., 2021; Frewen et al., 2021). 

Cross cultural data are being collected here.

Scoring positive above the cutoff or on certain domains (e.g. of PTSD, anxiety or depression may require more detailed follow assessments, e.g. with structured interviews for specific disorders.



Below please find a list of published articles that have used the GPS.

Ongoing research using the GPS

An overview of ongoing studies can be found here.

Any studies missing? Please email:

Using the GPS webapp for your own research?

For researchers and clinicians there is the possibility to get access to GPS app data collected through your own portal. Please contact us if you are interested.

GPS existing data sets

Please feel free to use existing data sets including the GPS to answer further research questions. These can be found here.

GPS User Guide

Using GPS


The GPS is freely available and accessible through the web-app, or by requesting the pdf by filling out the form below.


The User Guide provides background information, scoring instructions and norm scores for almost 7500 participants from many countries around the world.

Researchers or clinicians who wish to further translate the GPS in another language are requested to fill out the form below.

GPS for children and teenagers (GPS-c and GPS-T)

Versions for children and teens can be found here.

GPS Audio.png

Global Psychotrauma Screen (GPS) audio versions

To accommodate less literate individuals around the world to quickly and easily screen for trauma related symptoms we are currently testing out an audio version for the GPS in Portuguese. First results show this seems to work very well, especially in a vulnerable community.

Below please find the English language version. We will soon be adding the audio versions for several languages, including African dialects.

Supported by a charity: Sync Body-Brain Health


Paper in a Day Project: An Exploration of Trauma-Related Symptoms and Symptom Patterns Across the World 

Project leaders: Dr Hope Christie and Dr Anke de Haan


Paper in a Day (PIAD) is designed to stimulate international connections between young researchers from around the world and to foster the exchange of ideas by working on a tangible outcome: a brief paper or commentary for a peer-reviewed journal. Previous editions have led to journal articles, conference contributions, and lasting collaborations.


This PIAD workshop will have a cross-country focus, using a database containing over 10000 responses from participants worldwide, who are 16+ years in age. We are interested in cross-country differences in trauma-related symptoms and symptom patterns, as captured by the Global Psychotrauma Screen (GPS). We will explore the role of trauma characteristics and risk and protective factors across countries. The GPS has been developed by a group of international experts (see Olff et al., 2020; Schnyder et al., 2017) and is available in over 30 different languages. The GPS was developed in order to address the need for a brief instrument to assess potential acute or long-term consequences of stressful and/or traumatic events, that go beyond PTSD symptoms alone. Domains covered by the GPS include, but are not limited to: PTSD, anxiety, depression, and substance abuse. Further information about the instrument can be found here:


For questions about this project, please contact Dr Hope Christie.

How to participate

Registration closed.

*Student projects are projects run by students.

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!

Read more on Student projects.


Please register here to receive scoring information or more information on research


Thanks for submitting!


Marengo, D.,*, Hoeboer*, C.M., Veldkamp, B.P., GPS-txt consortium, & Olff M. (2022). Text mining to improve screening for trauma-related symptoms in a global sample. Psychiatry Research.

Williamson R. E et al. (2021): Symptom networks of COVID-19-related versus other potentially traumatic events in a global sample. Journal of Anxiety Disorders, 84, 102476

Olff, M., Primasari, I, Qing, Y, Coimbra B.M., Hovnanyan, A, Grace E,  Williamson, R.E., Hoeboer, C.M. & Global Collaboration on Traumatic Stress (GC-TS) (2021). Mental Health Responses to COVID-19 around the World. European Journal of Psychotraumatology,12(1),

Frewen, P., McPhail, I, Schnyder, U., Oe, M.,  Olff, M. (2021). Global Psychotrauma Screen (GPS): Psychometric Properties in two Internet-based Studies. European Journal of Psychotraumatology, 12(1),

Rossi, R., Socci, V., Talevi, D. Cinzia Niolu, C., Pacitti, F., Di Marco, A., Rossi, A., Siracusano, A., Di Lorenzo, G., Olff, M. (2021). Trauma-spectrum symptoms among the Italian general population in the time of the COVID-19 outbreak. European Journal of Psychotraumatology, 12(1),

Oe, M., Kobayashi, Y., Ishida, T., Chiba, H., Matsuoka, M., Kakuma, T., Frewen, P. & Olff, M. (2020). Screening for psychotrauma related symptoms: Japanese translation and pilot testing of the Global Psychotrauma Screen.  European Journal of Psychotraumatology, 11(1), doi 10.1080/20008198.2020.1810893.

Olff, M., Bakker, A.,  Frewen, P., Aakvaag, H., Ajdukovic, D., Brewer, D., Elmore Borbon, D.L., Cloitre, M., Hyland, P., Kassam-Adams, N., Knefel, M., Lanza, J.A., Lueger-Schuster, B., Nickerson, A., Oe, M., Pfaltz, M.C., Salgado, C., Seedat, S., Wagner, A.,  Schnyder, U. & Global Collaboration on Traumatic Stress (GC-TS) (2020). 

Screening for consequences of trauma – an update on the global collaboration on traumatic stress. European Journal of Psychotraumatology, 11(1), 1752504

Rossi, R., Socci, V., Pacitti, F., Di Lorenzo, G., Di Marco, A.,  Siracusano, A., Rossi, Alessandro (2020). Mental Health Outcomes Among Frontline and Second-Line Health CareWorkers During the Coronavirus Disease 2019 (COVID-19) Pandemic in Italy. JAMA Network Open. 2020;3(5):e2010185. doi:10.1001/jamanetworkopen.2020.10185 

Schnyder, U., Schafer, I., Aakvaag, H. F., Ajdukovic, D., Bakker, A., Bisson, J.I., Brewer, D., Cloitre, M., Dyb, G.A., Frewen, P., Lanza, J., Le Brocque, R., Lueger-Schuster, B., Mwiti, G.K., Oe, M., Rosner, R., Schellong, J., Shigemura, J., Wu, K., & Olff, M. (2017). The global collaboration on traumatic stress. European Journal of Psychotraumatology, 8(1),

Sousa, V.D. &  Rojjanasrirat, W. (2011). Translation, adaptation and validation of instruments or scales for use in cross-cultural health care research: a clear and user-friendly guideline. Journal of Evaluation in Clinical Practice 17 , 268–274

Child/adolescent studies


Grace, E., Sotilleo, Sh., Rogers, R., Doe, R., & Olff, M. (2021). Semantic adaptation of the Global Psychotrauma Screen for children and adolescents in the United States. European Journal of Psychotraumatology, 12, (1).

Cao, C., Wang, L., Fang, R., Liu, P., Bi, Y., Luo, S., Grace, E., & Olff, M. (2021). Anxiety, depression, and PTSD symptoms among high school students in China in response to the COVID-19 pandemic and lockdown. Journal of Affective Disorders, 296. 126-129.

* Shared first authorship