Quantiles of the ranked sum scores

Description

A rough estimate of the values of the latent variable ("ability"). The sum scores (number of correct responses) are ranked, breaking ties at random. The ranks are divided by the sample size + 1, and the corresponding quantiles of the standard Normal distribution are returned. Used as default in the non-parametric IRF plots produced by npp in analogy to Jim Ramsay's TestGraf. Another possible use is in itf.

Usage

  qrs(resp)

Arguments

Value

A one-column matrix of values

Author(s)

Ivailo Partchev

See Also

npp, itf

Examples

sc <- qrs(Scored)

Results