Carlos is interested in determining if constructivist instructional approaches promote better student learning than rote memory instructional approaches. He teaches groups of randomly assigned students for one hour, using constructivist approaches with half of the students and rote memory approaches with the other half of the students. The students are then given a test over the material and Carlos records the number of items each student answers correctly. In this study, the dependent variable is __________ and the independent variable is __________. Group of answer choices type of instructional approach; the test type of instructional approach; number of correct answers number of correct answers; the test number of correct answers; type of instructional approach