Used path analysis to examine effects of spatial skill, math anxiety, and math self-confidence as mediators of gender differences in Mathematics Scholastic Aptitude Test (SAT-M) in upper third of college-bound adolescents. Found that mental rotation and math self-confidence indirectly mediated the gender-SAT-M relationship. Most of the mediational…

Two studies are described which capitalize on the strengths of the instructional development process for research purposes. Typically, developed courses have carefully-designed learning environment specifications, replicable instructional treatments, and well-proven achievement measures. A battery of questionnaires and rating scales concerning…