Table 1.
Summary fit statistics for original and final models for MSIS-29 subscales
| Action | Analysis Number |
Overall model fit |
Item fit Mean (SD) |
Person fit Mean (SD) |
PSI | % significant t-tests |
| MSIS-29-PHYS | ||||||
| Original scale | 1 | χ2 = 44.04, df = 20, p = .002 | .31 (1.46) |
-.09 (1.33) |
.95 | |
| Rescoring to 3-point | 2 | χ2 = 21.59, df = 20, p = .36 | -.12 (1.29) |
-.44 (1.64) |
.93 | |
| Removal of 1 case | 3 | χ2 = 19.34, df = 20, p = .50 | -.10 (1.19) |
-.44 (1.58) |
.93 | 9.21% (CI:4–14%) |
| MSIS-29-PSYCH | ||||||
| Original scale | 4 | χ2 = 12.57, df = 9, p = .18 |
.09 (1.28) |
-.38 (1.58) |
.90 | |
| Removal of 1 case | 5 | χ2 = 14.79, df = 8, p = .10 |
.10 (1.31) |
-.33 (1.49) |
.91 | 1.69% |
PSI = Person Separation Index, SD = standard deviation, df = degrees of freedom, p = probability, CI = confidence interval