Figure 1

Structural equation models of confirmatory factor analysis. Figure 1 a depicted a standard unidimensional model of FBIS with good fit statistics (NFI = 0.92, CFI = 0.93, RMR = 0.02, RMSEA = 0.08, except GFI = 0.83 and AGFI = 0.79). Figure 1 b depicted an adjusted unidimensional model with even better fit statistics (GFI = 0.90, NFI = 0.95, CFI = 0.96, RMR = 0.02, RMSEA = 0.06, except AGFI = 0.88). The adjusted model was restructured according to the covariations among items (i.e. item 1 and 2, item 5 and 8, item 14 and 15, item 24 and 25) and results of exploratory factor analysis (i.e. item 7 and 8 were relocated from scale 2 to scale 1, item 17 was relocated from scale 4 to scale 6). Figure 1 c depicted a second-order mutlidimensional model and its fit statistics were as good as the adjusted unidimensional one.