ABSTRACT
This article is a report of the development of a new instrument to measure students’ attitudes toward mathematics, and to determine the underlying dimensions of the instrument by examining the responses of 545 students. The data represent all grade levels and subjects of the secondary mathematics curriculum. The reliability coefficient alpha was .97. A maximum likelihood factor analysis with a varimax rotation yielded four factors: self-confidence; value of mathematics; enjoyment of mathematics; and motivation. Psychometric properties were sound and the instrument, Attitudes Toward Mathematics Inventory (ATMI), can be recommended for use in the investigation of students' attitudes toward mathematics.