TY - JOUR
T1 - Psychometric properties of the Global Psychotrauma Screen in the United States
AU - Grace, Emma
AU - Rogers, Rosalind
AU - Usher, Robin
AU - Rivera, Iris Margarita
AU - Elbakry, Hanan
AU - Sotilleo, Shanelle
AU - Doe, Renee
AU - Toribio, Mariella
AU - Coreas, Narda
AU - Olff, Miranda
N1 - Funding Information: We thank Candace Ford, Adrienne Konstantin, and Amber Fitzwater for their recruitment efforts. Publisher Copyright: © 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
PY - 2023
Y1 - 2023
N2 - Background: Prior research assessing the psychometric properties of the Global Psychotrauma Screen provided support for its internal consistency reliability, construct validity, convergent validity, and divergent validity in several international samples, but not specifically in a U.S. subsample. Objective: The purpose of this study was to assess psychometric properties of the GPS in the U.S. Method: This observational study included a convenience sample of individually recruited participants (N = 231) who completed an initial study with 126-item online questionnaire and a two-week follow-up study with GPS alone through the weblinks provided by the research team. Data analyzes included measuring internal consistency and test–retest reliability, exploratory and confirmatory factor analyzes (EFA and CFA), convergent and divergent validity, sensitivity, specificity, and severity of the GPS symptom items. Additional CFA was conducted with data (N = 947) from the GPS multinational research project, U.S. subsample. Results: The results showed acceptable internal consistency and test–retest reliability, convergent validity, and divergent validity of the GPS. The construct validity results supported a three-factor structure of the GPS symptoms. The GPS domains showed acceptable sensitivity and specificity with the cut-off scores of 3 for PTSD and 5 for CPTSD domains; and the scores of 1 for the anxiety, depression, and insomnia domains respectively. The GPS risk factors predicted the GPS symptom severity. Conclusions: This study provides new and additional evidence on the psychometric properties of the GPS which may help health care providers with the selection of an appropriate screening instrument for trauma-related transdiagnostic symptoms. The study limitations should be addressed in future research through the replication of EFA and CFA internationally with larger samples, and the inclusion of a reference standard for dissociation.
AB - Background: Prior research assessing the psychometric properties of the Global Psychotrauma Screen provided support for its internal consistency reliability, construct validity, convergent validity, and divergent validity in several international samples, but not specifically in a U.S. subsample. Objective: The purpose of this study was to assess psychometric properties of the GPS in the U.S. Method: This observational study included a convenience sample of individually recruited participants (N = 231) who completed an initial study with 126-item online questionnaire and a two-week follow-up study with GPS alone through the weblinks provided by the research team. Data analyzes included measuring internal consistency and test–retest reliability, exploratory and confirmatory factor analyzes (EFA and CFA), convergent and divergent validity, sensitivity, specificity, and severity of the GPS symptom items. Additional CFA was conducted with data (N = 947) from the GPS multinational research project, U.S. subsample. Results: The results showed acceptable internal consistency and test–retest reliability, convergent validity, and divergent validity of the GPS. The construct validity results supported a three-factor structure of the GPS symptoms. The GPS domains showed acceptable sensitivity and specificity with the cut-off scores of 3 for PTSD and 5 for CPTSD domains; and the scores of 1 for the anxiety, depression, and insomnia domains respectively. The GPS risk factors predicted the GPS symptom severity. Conclusions: This study provides new and additional evidence on the psychometric properties of the GPS which may help health care providers with the selection of an appropriate screening instrument for trauma-related transdiagnostic symptoms. The study limitations should be addressed in future research through the replication of EFA and CFA internationally with larger samples, and the inclusion of a reference standard for dissociation.
KW - Global Psychotrauma Screen
KW - general distress
KW - psychometric properties
KW - screening
KW - traumatic stress
UR - http://www.scopus.com/inward/record.url?scp=85173978110&partnerID=8YFLogxK
U2 - https://doi.org/10.1080/21642850.2023.2266215
DO - https://doi.org/10.1080/21642850.2023.2266215
M3 - Article
C2 - 37811317
SN - 2164-2850
VL - 11
JO - HEALTH PSYCHOLOGY AND BEHAVIORAL MEDICINE
JF - HEALTH PSYCHOLOGY AND BEHAVIORAL MEDICINE
IS - 1
M1 - 2266215
ER -