Reynaldo is reviewing a study on the effectiveness of a new drug-free remedy for depression. In the study, a group of participants was given a natural supplement for a period of six weeks. They rated their mood both before and after treatment. Two-thirds of the group reported a marked improvement after the trial. What change in this study would do the most to increase Reynaldo's confidence that sound scientific practices were followed?

Question

anonymous · Answer

a. including a control group that did not receive the supplement
b. including information about the manufacturer and cost of the supplement
c. including more details about the self-reported mood ratings
d. including testimony of participants in the study's documentation

Im pretty sure its a, but i could be wrong. what do u think?

anonymous · Answer

a it is, good job

anonymous · Answer

thank u, can u help me with the question that says Jason and Matt, ill be there waiting..