Consider the Example of Cyr, a Researcher Who Studies the Role

Multiple Choice

Consider the example of Cyr, a researcher who studies the role of worked examples in engineering education. He measures students test performance and ratings of their instructors. He randomly assigns classes to condition. In some classes worked examples are shown, some where no worked examples are used, and a third set of classes in which students have access to worked examples if they elect to look at them.
-Cyr argues that his research is experimental. However, you know better given the following reason.

A) He randomly assigned in-tact groups not students
B) Ratings of instructors are not measured in experiments.
C) He uses a correlational approach to the study.
D) There is no dependent variable in his research study.