A researcher is conducting laboratory research regarding the effectiveness of a new drug on student attention and learning.

A researcher is conducting laboratory research regarding the effectiveness of a new drug on student attention and learning. The researcher randomly selects students from a single population and then randomly assigns the students to either a control group (who receive a placebo) or an experimental group (who receive the new drug). The researcher's study is an example of which type of experimental design?

a.Pre-experimental

b.Quasi-experimental

c.Experimental

d.Correlational