Dichotomous Data Set Based on Graduate Management Admission Test

Description

The GMAT2 data set is generated data set based on parameters from Graduate Management Admission Test (GMAT) data set (Kingston et al., 1985). First two items were considered to function differently in uniform and non-uniform way respectively. The data set represents responses of 1,000 subjects to multiple-choice test of 20 items. A correct answer is coded as 1 and incorrect answer as 0. The column group represents group membership, where 0 represents reference group and 1 represents focal group. Groups are the same size (i.e. 500 per group).

Usage

1
data(GMAT2)

Format

A GMAT2 data frame consists of 1,000 observations on the following 21 variables. The first 20 columns represent dichotomously scored items of the test. The 21st column is vector of group membership; values 0 and 1 refer to reference and focal group.

Author(s)

Adela Drabinova
Institute of Computer Science, The Czech Academy of Sciences
Faculty of Mathematics and Physics, Charles University
adela.drabinova@gmail.com

Patricia Martinkova
Institute of Computer Science, The Czech Academy of Sciences
martinkova@cs.cas.cz

Karel Zvara
Faculty of Mathematics and Physics, Charles University

References

Kingston, N., Leary, L., and Wightman, L. (1985). An Exploratory Study of the Applicability of Item Response Theory Methods to the Graduate Management Admission Test. ETS Research Report Series, 1985(2) : 1-64.

Drabinova, A. and Martinkova P. (2016). Detection of Differenctial Item Functioning Based on Non-Linear Regression, Technical Report, V-1229, http://hdl.handle.net/11104/0259498.

See Also

GMAT2test, GMAT2key