Listwise {TestDataImputation}

Listwise Deletion (LW)

Description

This function deletes examinees who report missing responses (see De Ayala et al. 2001) <doi:10.1111/j.1745-3984.2001.tb01124.x>.

Usage

Listwise(test.data, Mvalue = "NA")

Arguments

test.data

Test data set (a data frame or a matrix) containing missing responses. Missing values are coded as NA or other values (e.g., 8, 9).

Mvalue

Missing response indicators in the data (e.g. "NA", "8", "9", etc.). Mvalue="NA" by default.

Value

A data frame with no missing responses.

References

De Ayala, R. J., Plake, B. S., & Impara, J. C. (2001). "The impact of omitted responses on the accuracy of ability estimation in item response theory." Journal of Educational Measurement, 38(3), 213–234. doi:10.1111/j.1745-3984.2001.tb01124.x.

Examples

 
        Listwise(test.data, Mvalue="NA")