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Download full textJeff Allen; Jay Thomas; Stacy Dreyer; Scott Johanningmeier; Dana Murano; Ty Cruce; Xin Li; Edgar Sanchez – ACT Education Corp., 2025
This report describes the process of developing and validating the enhanced ACT. The report describes the changes made to the test content and the processes by which these design decisions were implemented. The authors describe how they shared the overall scope of the enhancements, including the initial blueprints, with external expert panels,…
Descriptors: College Entrance Examinations, Testing, Change, Test Construction
Mullis, Ina V. S., Ed.; Martin, Michael O., Ed.; von Davier, Matthias, Ed. – International Association for the Evaluation of Educational Achievement, 2021
TIMSS (Trends in International Mathematics and Science Study) is a long-standing international assessment of mathematics and science at the fourth and eighth grades that has been collecting trend data every four years since 1995. About 70 countries use TIMSS trend data for monitoring the effectiveness of their education systems in a global…
Descriptors: Achievement Tests, International Assessment, Science Achievement, Mathematics Achievement
Peer reviewedvon Davier, Alina A., Ed.; Liu, Mei, Ed. – ETS Research Report Series, 2006
This report builds on and extends existent research on population invariance to new tests and issues. The authors lay the foundation for a deeper understanding of the use of population invariance measures in a wide variety of practical contexts. The invariance of linear, equipercentile and IRT equating methods are examined using data from five…
Descriptors: Equated Scores, Statistical Analysis, Data Collection, Test Format
