Description Usage Arguments Value Author(s) References

View source: R/MantelHaenszel.R

Calculates the crossed probabilities associated with the numerator and denominator of the odds-ratio under dichotomous IRT models

1 | ```
CrossedProbabilities(thetaValue, itemParameters, logistic, irtModel = "3pl")
``` |

`thetaValue` |
A numeric value or array for the theta (ability) value(s) for which the odds will be calculated |

`itemParameters` |
A list containing the "focal" and "reference" item parameters. Item parameters are assumed to be on the same scale. |

`logistic` |
A logical indicating whether the logistic or the normal metric should be used. |

`irtModel` |
A string stating the irtModel used. May be one of "1pl", "2pl", or "3pl". |

out A list containing the crossed products for the 'num' the numerator, 'den' the denominator for the odds-ratio, and 'or' the odds-ratio

Victor H. Cervantes <vhcervantesb at unal.edu.co>

Roussos, L., Schnipke, D. & Pashley, P. (1999). A generalized formula for the Mantel-Haenszel Differential Item Functioning parameter. Journal of educational and behavioral statistics, 24(3), 293–322. doi:10.3102/10769986024003293

DFIT documentation built on May 29, 2017, 10:31 p.m.

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