The delta method was used to derive standard
errors (SEs) of the Levine observed score and
Levine true score linear equating methods. SEs with
a normality assumption as well as without a normality
assumption were derived. Data from two
forms of a test were used as an example to evaluate
the derived SEs of equating. Bootstrap SEs also
were computed for the purpose of comparison.
The SEs derived without the normality assumption
and the bootstrap SEs were very close. For the
skewed score distributions, the SEs derived with the
normality assumption differed from the SEs derived
without the normality assumption and the bootstrap
SEs. Index terms: equating, delta method, linear
equating, score equating, standard errors of equating.
Hanson, Bradley A, Zeng, Lingjia & Kolen, Michael J. (1993). Standard errors of Levine linear equating. Applied Psychological Measurement, 17, 225-237. doi:10.1177/014662169301700303
Hanson, Bradley A.; Zeng, Lingjia; Kolen, Michael J..
Standard errors of Levine linear equating.
Retrieved from the University of Minnesota Digital Conservancy,
Content distributed via the University of Minnesota's Digital Conservancy may be subject to additional license and use restrictions applied by the depositor.