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Table 2 Fit statistics of two-parameter IRT models within each study

From: Pre-statistical harmonization of behavrioal instruments across eight surveys and trials

Study No. items RMSEA CFI SRMR Bifactor
ADSPlus 12 0.059 0.927 0.1 No
ACT 20 0.043 0.868 0.111 Yes
ADAMS 18 0.048 0.913 0.11 Yes
ALZQOL 25 0.033 0.952 0.123 Yes
COPE 19 0.037 0.925 0.103 Yes
NACC 23 0.069 0.753 0.123 Yes
REACH II 17 0.056 0.85 0.103 Yes
TAP 16 0 1 0.118 Yes