content area top Part 1 To help assess student learning in her developmental science courses, a science professor at a university implemented pre- and post-tests for her developmental science students. A knowledge-gained score was obtained by taking the difference of the two test scores. Question content area bottom Part 1 What type of experimental design is this? Randomized block design Matched pair Your answer is correct. Completely randomized design Case-control Part 2 What is the response variable in this experiment? The score on the posttest Total in test scores Difference in test scores The score on the pretest