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ERIC Number: ED430040
Record Type: Non-Journal
Publication Date: 1999
Pages: 15
Abstractor: N/A
Reference Count: N/A
IRT Design for the School Achievement Indicators Program (SAIP).
Bertrand, Richard
New ways are proposed to look at data from the Canadian School Achievement Indicators Program (SAIP) using item response theory (IRT) modeling. The focus is on the traditional test of the SAIP 1997 mathematics study. The test is two-staged in that the first 15 items, of median difficulty, were to be completed beforehand by all students as a "placement" test. Where students were to start the second portion of the test was determined by their scores on the first 15 items. The dimensionality of the scale, the item fit, item bias, and item invariance were considered in applying IRT modeling. The scale obtained reflected the relative ability of the students. Results suggest that mean scale scores can be safely compared between jurisdictions, genders, or age groups. The proposed approach seems reasonably appropriate when a two-stage testing procedure has been used to evaluate students' performance. (Contains 1 table, 5 figures, and 19 references.) (SLD)
Publication Type: Reports - Research; Speeches/Meeting Papers
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Canada