Article Per Year (5 Year)
p-Index From 2020 - 2025
0.23
P-Index
This Author published in this journals
All Journal Gadjah Mada Journal of Psychology (GamaJoP)
Firmansyah, Ferdi Wahyu
Unknown Affiliation
Education Environmental Science Law, Crime, Criminology & Criminal Justice Public Health Social Sciences Other

Published : 1 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 1 Documents
Search

 1 
Psychometric Properties of the Indonesian Version of the Personal Growth Initiative Scale-II Using the Graded Response Model Firmansyah, Ferdi Wahyu; Andriani, Fitri
Gadjah Mada Journal of Psychology (GamaJoP) Vol 11, No 1 (2025)
Publisher : Faculty of Psychology, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/gamajop.91368

Abstract

Personal Growth Initiative Scale-II (PGIS-II) is the most recent and widely used scale to measure PGI, an active, conscious, focused, and intentional involvement of individuals in their growth process. In the Indonesian context, PGIS-II has been used in several studies, including scale validation using a classical test theory (CTT) approach. However, there is limited validation research using the item response theory (IRT) approach. Therefore, this study aimed to: (1) evaluate the item quality of the Indonesian version of PGIS-II, and (2) assess the scale's measurement precision using the IRT approach. Data were collected through an online survey from 376 participants (aged 15 to 64) and analyzed using RStudio software version 4.2.2. Confirmatory factor analysis showed that the four-factor model was the most appropriate fit for this scale. IRT analysis showed that the GRM model is the best based on data fit and model simplicity. The findings showed this scale has good psychometric properties, in terms of discrimination and location parameters, except for Items 6 and 14. Even with poor-quality items, this scale has provided high-reliability coefficients and meets the criteria of reliable measurement. This scale can assess individuals with very low to average levels of PGI.
Co-Authors Fitri Andriani, Fitri