skip to main content skip to footer

Testing the Untestable Assumptions of the Chain and Poststratification Equating Methods for the NEAT Design NEAT OSE CE PE

Author(s):
Holland, Paul W.; von Davier, Alina A.; Sinharay, Sandip; Han, Ning
Publication Year:
2006
Report Number:
RR-06-17
Source:
ETS Research Report
Document Type:
Report
Page Count:
38
Subject/Key Words:
Test Equating, Non-Equivalent-Groups Anchor Test (NEAT) Design, Observed-Score Equating (OSE), Chain Equating (CE), Poststratification Equating (PE)

Abstract

However, given that both methods are justified by making untestable assumptions, it is difficult to conclude which, if either, of the two approaches is more correct. This study compares predictions from both the PSE and the CE assumptions that can be tested in a comparable way with the data from a special study. Results indicate that both CE and PSE make very similar predictions but that those of CE are slightly more accurate than those of PSE.

Read More