| PerFit-package | Person Fit | 
| A.KB | Agreement, disagreement, and dependability statistics | 
| C.Sato | C.Sato, Cstar person-fit statistics | 
| Cstar | C.Sato, Cstar person-fit statistics | 
| cutoff | Compute a cutoff value given the scores of a person-fit statistic | 
| D.KB | Agreement, disagreement, and dependability statistics | 
| E.KB | Agreement, disagreement, and dependability statistics | 
| flagged.resp | Find (potentially) aberrant response patterns | 
| G | Number of Guttman errors | 
| Gnormed | Number of Guttman errors | 
| Gnormed.poly | Number of Guttman errors for polytomous items | 
| Gpoly | Number of Guttman errors for polytomous items | 
| Ht | Ht person-fit statistic | 
| InadequacyData | The NPV-J inadequacy scale data | 
| IntelligenceData | Intelligence data (number completion) | 
| lz | lz and lzstar person-fit statistics | 
| lzpoly | lzpoly person-fit statistic | 
| lzstar | lz and lzstar person-fit statistics | 
| NCI | NCI person-fit statistic | 
| PerFit | Person Fit | 
| PerFit.PFS | Compute several person-fit statistics | 
| PerFit.SE | Compute standard errors for person fit statistics | 
| PhysFuncData | The SF-36 physical functioning data | 
| plot.PerFit | Plot method for objects of class "PerFit" | 
| PRFplot | Person response function (PRF) | 
| print.PerFit | Print method for objects of class "PerFit" | 
| r.pbis | Personal biserial statistic | 
| summary.PerFit | Summary method for objects of class "PerFit" | 
| U3 | U3, ZU3 person-fit statistics | 
| U3poly | U3poly person-fit statistic | 
| ZU3 | U3, ZU3 person-fit statistics |