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rpf (version 0.8)

rpf.gpcm: Create a generalized partial credit model and associated hyperparameters.

Description

Create a generalized partial credit model and associated hyperparameters.

Usage

rpf.gpcm(numOutcomes = 2, dimensions = 1,
    multidimensional)

Arguments

numOutcomes
The number of choices available
dimensions
the number of dimensions
multidimensional
whether to use a multidimensional model. Defaults to TRUE when dimensions>1 and FALSE when dimensions==1.

Value

  • an item model

References

Baker & Kim (2004). Item Response Theory: Parameter Estimation Techniques. Marcel Dekker, Inc.

Masters, G. N. (1982). A rasch model for partial credit scoring. Psychometrika, 47(2), 149-174.

Muraki, Eiji. (1992). A generalized partial credit model: Application of an EM algorithm. Applied Psychological Measurement, 16, 159-176. doi:10.1177/014662169201600206