Dr. Kelvin Gregory

Indonesian Achievement Scores for TIMSS 2003: Effects of Changing The Score Estimation Model

August 2, 2018

35th annual conference (2009), Dr. Kelvin Gregory, Ms Diah Wihardini

The Trends in International Mathematics and Science Studies (TIMSS), like other international assessment studies, uses a complex scaling methodology to produce population-orientated scores for participating countries. Based on item response…

Modeling Science Achievement in South Africa Using International Achievement Data: Some Comparability Validity Issues

August 2, 2018

35th annual conference (2009), Dr. Anil Kanjee, Dr. Kelvin Gregory

International comparative studies of achievement facilitate national reflection on educational practice and experience. Such studies use sophisticated assessment designs, detailed questionnaires, complex scaling methodologies and stringent quality control systems to…

Dr. Kelvin Gregory

Indonesian Achievement Scores for TIMSS 2003: Effects of Changing The Score Estimation Model

Modeling Science Achievement in South Africa Using International Achievement Data: Some Comparability Validity Issues

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