The third-grade teachers in one school are interested in the effects of seating assignments on self-esteem of students. Half of the teachers uses a new seating strategy for the year and half use the existing strategy. All students take a self-esteem measure at the beginning of the school year. At the end of the school year, students take a self-esteem measure. This study best illustrates which of the following designs?
◦ Pretest-posttest control group design
◦ Nonequivalent control group design
◦ Solomon four-group design
◦ One-group pretest-posttest design