Cognitive Diagnostic Assessment of TIMSS (Trends in International Mathematics and Science Study) 2007 Mathematics Achievement Items for Eighth Graders in Turkey

• In Event: Roundtable Session 26
  In Roundtable Session: Rasch Measurement SIG Roundtable Session

Abstract

The least squares distance method (LSDM) was used in a cognitive diagnostic analysis of TIMSS items administered to 4,498 8th-grade students from seven geographical regions of Turkey, extending analysis of attributes from content to process and skill attributes. Logit item positions were compared between data for Turkey and the full international data. The Pearson correlation between item logit positions was r = .82, though several items were not invariant across the datasets. Results indicated that the majority of the TIMSS items were well explained by a set of 20 attributes (R2 = .65). This study provides an extension of work by Dimitrov (2007) in use of LSDM in cognitive diagnostic analysis.

Authors

• Turker Toker, University of Denver

• Kathy E. Green, University of Denver