Equate groups
bookPart
This chapter introduces the concepts and tools needed to link assessments made by different instruments administered across multiple cohorts. Systematic application of equate groups provides a robust yet flexible methodology to link different instruments. An equate group is a set of two or more milestones that measure the same thing in (perhaps slightly) different ways. Content matter experts may form equate groups by evaluating the contents of items and organizing them into groups with similar meaning. The modelling phase takes this set of equate groups (which may be hundreds) as input. The end goal for using the equate group method to model development items is to measure development on one common latent scale, the D-score. The evaluation of equate fit involves comparing the observed probabilities of endorsing the items in the equate group to the estimated probability of endorsing the items in the equate group. (C) 2021 van Buuren S and Eekhout I. Creative Commons, CC BY-NC-ND.
TNO Identifier
993367
ISBN
9781000805536
9781032106342
9781032106342
Publisher
CRC Press
Source title
Child Development with the D-score
Editor(s)
Buuren, S. van
Eekhout, I.
Eekhout, I.
Place of publication
Boca Raton
Pages
127-138