The two-phase study was designed to (1) create a means whereby preservice teachers could lengthen the time they allow for a student to respond after posing a question; and (2) to study the relationship of want-time as an independent variable and dialogue measure, as a dependent variable. (RE)

Evaluated the effects of cooperative learning on students' (n=36) verbal interaction patterns and achievement in a conceptual change instructional model in secondary science. It was found that students using cooperative-learning strategies showed greater achievement gains and made greater use of specific verbal patterns believed to be related to…