measures' classification ability ranges from 60.80% to 79.23%,
where Δ Qu5 and ΔTn1 provide the lowest and highest univariate
classification accuracy, respectively. The fit Δ measures for the
isolated models based on the refined scales concluded from
repeated model fittings using a minimum RMSR procedure show a
good fit with the observed data. The RMSRs of the isolated models
are all smaller than .10, which indicates an excellent model fit
(Harrington, 2008).