Ubuz, BehiyeAydın, Utkun2019-02-282019-02-282019-02-282019-02-282015Aydın, U., & Ubuz, B. (2015). THE THINKING-ABOUT-DERIVATIVE TEST FOR UNDERGRADUATE STUDENTS: DEVELOPMENT AND VALIDATION. International Journal of Science and Mathematics Education, 13, 6, 1279-1303.1571-00681573-1774https://hdl.handle.net/20.500.11779/647http://dx.doi.org/10.1007/s10763-014-9545-xUtkun Aydın (MEF Author)Two studies were conducted for the development and validation of a multidimensional test to assess undergraduate students' mathematical thinking about derivative. The first study involved two phases: question generation and refinement of the Thinking-about-Derivative Test (TDT). The second study included four phases as follows: test administration, generalizability analysis, confirmatory factor analysis, and subgroup validity analysis. Findings suggested that the 30-item multiple-choice TDT, which comprises 6 mathematical thinking aspects, enactive, iconic, algorithmic, algebraic, formal, and axiomatic thinking, demonstrates acceptable levels of reliability and validity. Followed by additional cross-validation studies, the TDT may be a useful tool for mathematics education researchers and mathematicians. Directions for future research and implications for educational practice are discussed.eninfo:eu-repo/semantics/openAccessMathematical thinkingDerivativeReliabilityValidityMultiple-choice testArticle10.1007/s10763-014-9545-x2-s2.0-84949095886