mag: DIF Magnitude Calculation
In brookiem86/dDIF: MH and LR DIF Detection for Dichotomously Scored Items
Description
Usage
Arguments
Value
References
See Also
Description
mag categorizes the DIF magnitudes
Usage
1
mag(m, meth)
Arguments
m
value used for calculating DIF magnitudes
meth
type of method to calculate. Options include "zt" for
logistic regression magnitude values suggested by Zumbo and Thomas
(1997), and "ds" for the MH magnitude value categories from using
ETS's delta scale (Holland & Thayer, 1985).
This function is used to categorize DIF magnitudes in the functions
LRd and MHd
Value
a character value representing the DIF magnitude categorization
References
Holland, P. W. and Thayer, D. T. (1985). An alternative definition of the
ETS delta scale of item difficulty. Research Report RR-85-43. Princeton,
NJ: Educational Testing Service.
Zumbo, B. D.,&Thomas, D. R. (1997). A measure of effect size for a
model-based approach for studying DIF (Working paper of the Edgeworth
Laboratory for Quantitative Behavioral Science). Prince George, Canada:
University of Northern British Columbia.
See Also
LRd for LR DIF method, MHd for MH DIF method
brookiem86/dDIF documentation built on May 13, 2019, 7:50 a.m.
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Description Usage Arguments Value References See Also
Description
mag categorizes the DIF magnitudes
Usage
1 | mag(m, meth)
|
Arguments
m |
value used for calculating DIF magnitudes |
meth |
type of method to calculate. Options include "zt" for logistic regression magnitude values suggested by Zumbo and Thomas (1997), and "ds" for the MH magnitude value categories from using ETS's delta scale (Holland & Thayer, 1985). This function is used to categorize DIF magnitudes in the functions
|
Value
a character value representing the DIF magnitude categorization
References
Holland, P. W. and Thayer, D. T. (1985). An alternative definition of the ETS delta scale of item difficulty. Research Report RR-85-43. Princeton, NJ: Educational Testing Service.
Zumbo, B. D.,&Thomas, D. R. (1997). A measure of effect size for a model-based approach for studying DIF (Working paper of the Edgeworth Laboratory for Quantitative Behavioral Science). Prince George, Canada: University of Northern British Columbia.
See Also
LRd for LR DIF method, MHd for MH DIF method
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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