| polytomousItemParameters {DFIT} | R Documentation |
Sets of focal and reference item parameters from Raju et al. (2009)
Description
This data set contains the item parameters found in Raju, N., Fortmann-Johnson, K., Kim, W., Morris, S., Nering, M. & Oshima, T. (2009). The item parameter replication method for detecting differential functioning in the polytomous DFIT framework. Applied psychological measurement, 33(2), 133–147.
Usage
data(polytomousItemParameters)
Format
a list with 'focal' and 'reference' elements. Each is a matrix 1 row per item by 5 columns: item discrimination, four item step parameters.
Source
This data set contains the item parameters based on those found in Raju et al. (2009).
References
Raju, N., Fortmann-Johnson, K., Kim, W., Morris, S., Nering, M. & Oshima, T. (2009). The item parameter replication method for detecting differential functioning in the polytomous DFIT framework. Applied psychological measurement, 33(2), 133–147. doi: 10.1177/01466216083319514