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Zhang, Danhui; Orrill, Chandra; Campbell, Todd – School Science and Mathematics, 2015
The purpose of this study was to investigate whether mixture Rasch models followed by qualitative item-by-item analysis of selected Programme for International Student Assessment (PISA) mathematics and science items offered insight into knowledge students invoke in mathematics and science separately and combined. The researchers administered an…
Descriptors: Qualitative Research, Standardized Tests, Mathematics Achievement, Science Achievement