TY - JOUR
T1 - Psychometric properties of Grit-S scale in university students
T2 - An application of the graded response model
AU - Alhadabi, Amal
N1 - Funding Information:
The author received no direct funding for this research.
Publisher Copyright:
© 2023 The Author(s). This open access article is distributed under a Creative Commons Attribution (CC-BY) 4.0 license.
PY - 2023
Y1 - 2023
N2 - This study adopted an item response theory to evaluate the Grit-S scale and its dimensions (i.e., Consistency of interest [G-CI] and Perseverance of effort [G-PE]) among university students (N = 450) using two unidimensional Graded Response (GR), multidimensional GR, and bifactor GR models. Differential item functioning (DIF) across two countries (Oman and the United States) was investigated. For G_CI, the findings showed acceptable values for item discrimination, trait thresholds, reasonable precision in both samples, and two uniform DIF. The findings of G_PE showed two questionable item-discrimination parameters (Items 7 and 8) in the two samples, two non-uniform (i.e., Items 5 and 8) and two uniform DIF (i.e., Items 6 and 8). Acceptable precision was found only in the U.S. sample. Item 8 was the source of imprecision in the Omani sample. These results indicated that further modification is needed to improve the precision of the scale in the Omani culture.
AB - This study adopted an item response theory to evaluate the Grit-S scale and its dimensions (i.e., Consistency of interest [G-CI] and Perseverance of effort [G-PE]) among university students (N = 450) using two unidimensional Graded Response (GR), multidimensional GR, and bifactor GR models. Differential item functioning (DIF) across two countries (Oman and the United States) was investigated. For G_CI, the findings showed acceptable values for item discrimination, trait thresholds, reasonable precision in both samples, and two uniform DIF. The findings of G_PE showed two questionable item-discrimination parameters (Items 7 and 8) in the two samples, two non-uniform (i.e., Items 5 and 8) and two uniform DIF (i.e., Items 6 and 8). Acceptable precision was found only in the U.S. sample. Item 8 was the source of imprecision in the Omani sample. These results indicated that further modification is needed to improve the precision of the scale in the Omani culture.
KW - differential item functioning
KW - graded response model
KW - Grit
KW - psychometric properties
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U2 - 10.1080/2331186X.2022.2162699
DO - 10.1080/2331186X.2022.2162699
M3 - Article
AN - SCOPUS:85145275714
SN - 2331-186X
VL - 10
JO - Cogent Education
JF - Cogent Education
IS - 1
M1 - 2162699
ER -