Equating Methods for Multidimensional IRT Item Paramters

2016 Fiscal Year Final Research Report

• Project/Area Number: 25380871
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Educational psychology
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Mayekawa Shin-ichi 東京工業大学, リベラルアーツ研究教育院, 教授 (70190288)
• Research Collaborator: Oki Yoshinori
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 項目反応理論 / 多次元項目反応理論 / 等化 / プロクラステス回転

Outline of Final Research Achievements

Three equating method for multidimensional item response theory item parameters were developed and evaluated using real data set.
1) Simultaneous equating method for independently estimated item parameters using generalized Procrustes rotation method. 2) Equating method based on the ability parameters which keeps the original factor correlation unchanged. 3) Equating method based on both the ability and item parameters which keeps the original factor correlation unchanged.
As an spin-off product of this research, general factor rotation method which keeps the original factor correlation unchanged.

Free Research Field

心理測定学