Constructing one scale to describe two statewide exams.
This study applies two approaches in creating a single scale from two separate statewide exams (Golden State Math Exam and California Standard Math Test) and compares some aspects of the two statewide tests. The first analysis involves a sequence of unidimensional Rasch scalings, using anchored items to scale the two tests together. The second analysis employs a 2-dimensional Rasch scaling using previous unidimensional analysis results to link the scales. The linking facilitates the investigation of their measurement properties of the two exams and is a basis for combining items from both exams to develop a more efficient testing program. The results of the comparisons of the two statewide exams based on the linking are shown and discussed.
Paek
Insu
I
Educational Testing Service, Rosedale Road, MS-O2P, Princeton, NJ 08541, USA. ipaek@ets.org
Peres
Deborah G
DG
Wilson
Mark
M
D002140:California; D003627:Data Interpretation, Statistical; D004521:Educational Measurement / Q000706:statistics & numerical data*; D008433:Mathematics; D015233:Models, Statistical