Yogyakarta, September 15, 2025 – A study titled “An Analysis of Measurement Invariance of the Patient Health Questionnaire-9 Between Indonesia, Germany, and the USA” authored by Eric Sucitra, Riangga Novrianto, Yolanda T. Pasaribu, Tania M. Lincoln, and Edo S. Jaya has been published in the journal Assessment. This journal is indexed in Scopus (Q1) and WoS (SSCI), with an Impact Factor of 3.4.
The research, which involved scholars from the Faculty of Psychology at Universitas Gadjah Mada (UGM), demonstrated that the Patient Health Questionnaire-9 (PHQ-9)—one of the most widely used instruments to measure depressive symptoms—can be applied universally regardless of a country’s per capita income level.