Table 6 Comparison of the Capabilities of each Software Package
From: A comparison of the polytomous Rasch analysis output of RUMM2030 and R (ltm/eRm/TAM/lordif)
| RUMM2030 | R-ltm | R-eRm | R-TAM | R-lordif | |
|---|---|---|---|---|---|
| Model Fit Statistics | YES | YES | YES | YES | NO |
| Unidimensionality | YES | YESa | YESd | YES | NO |
| Category Thresholds | YES | NO | YES | YES | YES |
| DIF | YES | YESa | YESa | YES | YES |
| Local Independence | YES | YES | YES | YES | NO |
| Reliability | YESb | YESc | YESe | YESf | NO |