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New Psychometric Evidence of the Grief Impairment Scale (GIS) in People Who Have Experienced the Death of a Loved One From a Network Psychometric Approach in Two Latin American Countries
Author(s)
Caycho‐Rodríguez, Tomás
Universidad Científica del Sur
Ventura‐León, José
Private University of the North
Universidad Norbert Wiener
Baños-Chaparro, Jonatan
Universidad Científica del Sur
Yupanqui-Lorenzo, Daniel E.
Universidad de Ciencias y Humanidades
Valencia, Pablo D.
Universidad Nacional Autónoma de México
Torales, Julio
Universidad Nacional De Caaguazú
Carbajal‐León, Carlos
Universidad de San Martín de Porres
Lobos-Rivera, Marlon Elías
Universidad Tecnológica de El Salvador
Reyes-Bossio, Mario
Peruvian University of Applied Sciences
Barrios, Iván
Universidad Nacional De Caaguazú
Jaimes-Alvarez, Freddy
Universidad Científica del Sur
Lee, Sherman A.
Christopher Newport University
Date Issued
31 de mayo de 2024
Type
Article
Volume
93
Issue
2
Series/Report No.
OMEGA - Journal of Death and Dying
Start Page
1131
End Page
1154
ISSN
0030-2228
1541-3764
Abstract
This study aimed to evaluate the psychometric properties of the Grief Impairment Scale (GIS) using a network psychometric model. A total of 1048 individuals from Peru and El Salvador participated. A network psychometric model was used to determine internal structure, reliability, and cross-country invariance. The results indicate that the GIS items were grouped into a single network structure through Exploratory Graph Analysis. Reliability was estimated by structural consistency, and it was found that when replicating the network structure within an empirical dimension, a single network structure was consistently obtained, and all items remained stable. Furthermore, the network structure was invariant, thus functioning similarly across the different country groups. In conclusion, the GIS presented solid psychometric evidence of validity based on its internal structure, reliability, and cross-country invariance. Therefore, the GIS is a psychometrically sound measure of functional impairment symptoms due to grief for Peruvian and Salvadoran individuals.