Randall E. Schumacker’s scientific contributions

... RMSEA < 0.06, IFI > .90, and regression weight ≥ .50 (Hu & Bentler, 1999;Schumacker & Lomax, 2015). The model's fitness was evaluated by meeting at least three thresholds. ...

Reference:

Effects of Mathematics Teaching Styles on Students' Performance: Moderations of Gender, School Type, Location, and Ability Group

... We performed the CFA using a weighted least square mean and variance adjusted (WLSMV) estimator 5 in R, which is suitable for handling ordinal (Likert) scales and non-normal distributions (Schumacker & Lomax, 2004). Initially, we evaluated the goodness of fit of the 4factor model emerging from EFA (see Table 5) based on the following measures and thresholds simultaneously (Schumacker & Lomax, 2004): the root mean square error of approximations RMSEA ≤ 0.05, the root mean square of the residuals SRMR ≤ 0.08, Tucker Lewis Index of factoring reliability TLI ≥ 0.9, Comparative Fit Index CFI ≥ 0.95, and 2 ∕ < 2. The results (RMSEA = 0.083 > 0.05, SRMR = 0.088 > 0.08, TLI = 0.902 > 0.9, CFI = 0.915 < 0.95, and 2 ∕ = 532.54∕183 ...

Reference:

The Critical Role of Trust in Adopting AI-Powered Educational Technology for Learning: An Instrument for Measuring Student Perceptions