The interaction of learner aptitudes with instructional treatment in quadratic inequalities

Many questions remain to be answered about the role of individual differences in learning. In the area of mathematics learning, do spatial and general reasoning abilities interact with instructional treatment? This study extends a series of earlier studies examining the interaction between aptitudes and instructional treatment. One treatment was strong in verbal-pictorial-numeric content; the other treatment was strong in verbal-symbolic-numeric content. Interactions between instructional treatment and the aptitudes are reported.