Generally non-significant deviations from the model expectations are expected for chi-square-based statistics, and within range (± 2.5) for residual fit statistics.
Where the observed pattern of responses do not deviate too much from that expected by the model, the scale is said to satisfy Rasch model expectations.
Two items (item SSE_2 and item SSE_7) did not perform as expected and were removed to achieve better fit to the Rasch model expectations.
Fig. 2 Path model (expectations of future performance).
The original MFM failed to meet the model expectations in each domain.
Data were subsequently analyzed with Rasch software to design the item set to fit model expectations.
The item separation index is 13.17 based on the empirical data or 13.37 based on the model expectations.
The test differentiated subjects with a person separation index of 2.08 based on the empirical data or 2.28 based on the model expectations.
We observed all but one of 22 possible combinations and the most common and least common combinations matched model expectations.
Both scales met Rasch model expectations.
Initial fit to model expectations was poor.
