title: Constructing one scale to describe two statewide exams.
abstract: 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.
authors: Educational Testing Service, Rosedale Road, MS-O2P, Princeton, NJ 08541, USA. ipaek@ets.org
authors: Insu
authors: I
authors: Paek
authors: Deborah G
authors: DG
authors: Peres
authors: Mark
authors: M
authors: Wilson
mesh_terms: D002140:California; D003627:Data Interpretation, Statistical; D004521:Educational Measurement / Q000706:statistics & numerical data*; D008433:Mathematics; D015233:Models, Statistical