Three analytic approaches were used in a framework of classical test theory to examine the construct validity of a mathematics assessment of 16 constructed response items. Results from 280 elementary school students across four age groups suggest a developmental structure of tasks and subdomains that was generally consistent with the test's…

Fifty education majors in two sections responded to an Attitudes toward Mathematics and Its Teaching (ATMAT) scale. Results with two psychometric models, classical true-score theory and the one-parameter Rasch model, supported the ATMAT's reliability, content and construct validity, and invariance over three time points. (SLD)