Table 6 Person and item summary statistics before and after removal of misfit responses
Before identifying misfit respondents | After identifying misfit respondents | |||
|---|---|---|---|---|
Person (n = 200) | Item (n = 27) | Person (n = 192) | Item (n = 27) | |
Cronbach’s alpha (α) | 0.78 | 0.78 | ||
Reliability index (μ) | 0.78 | 0.98 | 0.79 | 0.98 |
Separation index | 1.90 | 7.65 | 1.94 | 7.62 |
Mean | 0.54 | 0.00 | 0.54 | 0.00 |
Max measure | 3.03 | 0.74 | 3.10 | 0.74 |
Min measure | −0.30 | − 0.91 | −0.31 | − 0.98 |
Spread | 3.33 | 1.65 | 3.41 | 1.72 |
Standard deviation | 0.35 | 0.51 | 0.36 | 0.52 |
Outfit | ||||
Mean Square | 1.05 | 1.05 | 1.04 | 1.04 |
z-Standard | −0.10 | 0.10 | −0.10 | 0.00 |