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. Author manuscript; available in PMC: 2021 Nov 1.
Published in final edited form as: Rehabil Psychol. 2019 Oct 3;65(4):455–470. doi: 10.1037/rep0000291

Table 2.

Unidimensional Modeling and Analyses

Unidimensional Modeling Initial Item
Performance		 IRT
Modeling
Domain Item pool EFA E1/E2 ratio
(criterion >4)		 Percent of variance
for E1
(criterion >40)
 1-factor CFA loading
(criterion <.50)		 1-factor CFA
residual correlation
(criterion >.20)
 1-factor CFA
modification index
(criterion ≥ 100)		 Item-adjusted total
score correlations
(Criterion <.40)		 Sparse cells
(criterion<10)		 Problems with
monotonicity		 IRT item misfit DIF Interim/Final item
bank
TBI- CareQOL Emotional Suppression 43 items Yes 58.1% 1 item 6 items 10 items 1 item 0 items 0 items 4 items 0 items 21 items

Note. CFA = Confirmatory Factor Analysis; EFA = Exploratory Factor Analysis; IRT = Item Response Theory