Big Pharm Drug Company is conducting research of their new drug Attendomax to improve the note-taking behavior of college students diagnosed with Attention Deficit Disorder. Fifty of the students receive capsules contain Attendomax, another fifty receive capsules which look the same but actually contain the drug Ritalin, which has been used for many years. All students attend the same series of lectures and have their notes collected afterward. Notes are scored for completeness and accuracy. Write down dependent and independent variables in the above case.