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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)
Tomás Caycho‐Rodríguez
José Ventura‐León
Lindsey W. Vilca
Jonatan Baños-Chaparro
Daniel E. Yupanqui-Lorenzo
Pablo D. Valencia
Júlio Torales
Carlos Carbajal‐León
Marlon Elías Lobos-Rivera
Mario Reyes-Bossio
Iván Barrios
Freddy Roberpierre Jaimes-Alvarez
Sherman A. Lee
Date Issued
31 de mayo de 2024
Type
Article
Volume
93
Issue
2
Start Page
1131
End Page
1154
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.
Keywords