The ogive constant can be multiplied by the
discrimination parameter to obtain a response curve very
similar to the Normal cumulative distribution function
(Haley, 1952). In recent years, the logistic has grown
in favor, and therefore, this package does not offer any
special support for this transformation (Baker & Kim,
2004, pp. 14-18).
Usage
rpf.ogive
Arguments
format
num 1.7
References
Baker & Kim (2004). Item Response Theory: Parameter
Estimation Techniques. Marcel Dekker, Inc.
Haley, D. C. (1952). Estimation of the dosage mortality
relationship when the dose is subject to error (Technical
Report No. 15). Stanford University Applied Mathematics
and Statistics Laboratory, Stanford, CA.