KB36: Data on two 36-items test forms

In SNSequate: Standard and Nonstandard Statistical Models and Methods for Test Equating

Data on two 36-items test forms

Description

The data set contains both response patterns and item parameters estimates following a 3PL model for two 36-items tests forms. Form X was administered to 1655 examinees and form Y to 1638 examinees. Also, 12 out of the 36 items are common between both test forms (items 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36). This data has been described and analized by Kolen and Brennan (2004).

Usage

data(KB36)

Format

A list with four elements containing binary data matrices of responses (KBformX and KBformY) and the corresponding parameter estimates which result from a 3PL fit to both data matrices (KBformX_par and KBformY_par).

Source

The data come with the distribution of the CIPE software which is freely available at https://education.uiowa.edu/casma/computer-programs. The list of item parameters estimates can be found in Table 6.5 of Kolen and Brennan (2004).

References

Kolen, M., and Brennan, R. (2004). Test Equating, Scaling and Linking. New York, NY: Springer-Verlag.

Examples

data(KB36)
## maybe str(KB36) ; plot(KB36) ...

SNSequate documentation built on Dec. 28, 2022, 1:35 a.m.