make.rater {ordinalRR}

Format the parameters for a single rater.

Description

This function accepts fixed parameters for the De Mast-Van Wieringen Model of a single rater and formats them, so meaningful parametric functions can be displayed with the plot() function.

Usage

make.rater(alpha,cutpoints)

Arguments

alpha

‘positive scalar’ the rater's discrimination parameter.

cutpoints

‘vector’ H-1 (ordered values) corresponding to an H-point ordinal scale.

Value

rater

‘rater’ a list of rater parameters

Author(s)

Ken Ryan

References

de Mast, J. and van Wieringen, W.N. (2010). “Modeling and Evaluating Repeatability and Reproducibility of Ordinal Classifications.” Technometrics, 52(1), 94-106.

See Also

compute.q

Examples

(rater1=make.rater(1,c(-1.7,-0.5,1.6))) #3 cutpoints, so H=4
(prob=compute.q(rater1,.1)) #probabilities of 1,2,3,4 if part quality is x=.1
sum(prob) #should sum to one