ltm (version 0.8-9)

LSAT: The Law School Admission Test (LSAT), Section VI

Description

The LSAT is a classical example in educational testing for measuring ability traits. This test was designed to measure a single latent ability scale.

format

A data frame with the responses of 1000 individuals to 5 questions.

source

This LSAT example is a part of a data set given in Bock and Lieberman (1970).

References

Bartholomew, D., Steel, F., Moustaki, I. and Galbraith, J. (2002) The Analysis and Interpretation of Multivariate Data for Social Scientists. London: Chapman and Hall. Bock, R. and Lieberman, M. (1970) Fitting a response model for $n$ dichotomously scored items. Psychometrika, 35, 179--197.

Examples

## Descriptive statistics for LSAT data
dsc <- descript(LSAT)
dsc
plot(dsc)