Open AccessA SCALE DRIFT STUDY
Author(s) -
Liu Jinghua,
Curley Edward,
Low Albert
Publication year - 2009
Publication title -
ets research report series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.235
H-Index - 5
ISSN - 2330-8516
DOI - 10.1002/j.2333-8504.2009.tb02200.x
Subject(s) - scale (ratio) , stability (learning theory) , degree (music) , schedule , statistics , mathematics , psychology , computer science , physics , machine learning , geography , cartography , acoustics , operating system
This study examines the stability of the SAT ® scale from 1994 to 2001. A 1994 form and a 2001 form were readministered in a 2005 SAT administration, and the 1994 form was equated to the 2001 form. The new conversion was compared to the old conversion. Both the verbal and math sections exhibit a similar degree of scale drift, but in opposite directions: the verbal scale has drifted upward, whereas the math scale has drifted downward. We suggest testing programs monitor the score scales periodically by building a testing form schedule that allows a systematic and periodic checking of scale stability.