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Table 6 Summary of the model fit information from the SEM models

From: A structural equation modeling approach for examining position effects in large-scale assessments

Model Number of parameters Loglikelihood value Scaling factor AIC BIC
M1: Rasch model 45 −257,591 0.992 515,272 515,604
M2: Form effect 48 −257,590 1.008 515,277 515,631
M3: Passage position effect 52 −257,571** 1.007 515,246 515,629
M4: Item position effect 90 −257,420** 0.991 515,019 515,683
M4: Item position effect* 68 −257,437** 0.992 515,010 515,511
  1. * This model only included the significant item position effects in M4
  2. ** The model fits the data significantly better than M1 at the alpha level of α = .05