Several personfit statistics (PFSs) 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 likelihoodbased PFSs (lz, lz*) and the groupbased 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.
Package details 


Author  Jorge N. Tendeiro 
Date of publication  20161018 15:04:11 
Maintainer  Jorge N. Tendeiro <j.n.tendeiro@rug.nl> 
License  GPL (>= 2) 
Version  1.4.1 
Package repository  View on CRAN 
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