PerFit
Person Fit
Several person-fit statistics (PFSs; Meijer and Sijtsma, 2001, <doi:10.1177/01466210122031957>) are offered. These statistics allow assessing whether individual response patterns to tests or questionnaires are (im)plausible given the other respondents in the sample or given a specified item response theory model. Some PFSs apply to dichotomous data, such as the likelihood-based PFSs (lz, lz*) and the group-based PFSs (personal biserial correlation, caution index, (normed) number of Guttman errors, agreement/disagreement/dependability statistics, U3, ZU3, NCI, Ht). PFSs suitable to polytomous data include extensions of lz, U3, and (normed) number of Guttman errors.
Versions across snapshots
| Version | Repository | File | Size |
|---|---|---|---|
1.4.7 |
rolling source/ R- | PerFit_1.4.7.tar.gz |
72.9 KiB |
1.4.7 |
latest source/ R- | PerFit_1.4.7.tar.gz |
72.9 KiB |
1.4.7 |
2026-04-23 source/ R- | PerFit_1.4.7.tar.gz |
72.9 KiB |
1.4.7 |
2026-04-09 windows/windows R-4.5 | PerFit_1.4.7.zip |
295.9 KiB |