To investigate the effects of a new drug for hyperactivity, one group of children is given this new drug, while the other group is given a placebo. The experimenter has his assistant label the drug and the placebo with letter names so that he will not know which group of children is getting the placebo and which group is getting the new drug until the end of the experiment. This researcher is using a
A)double-blind experiment to minimize research participant bias and researcher bias.
B)single-blind experiment to minimize observer bias and the observer effect.
C)triple-blind experiment that incorporates random selection and random assignment.
D)placebo effect to maximize the self-fulfilling prophecy.

Question

Quizplus · Accepted Answer

This is a double-blind experiment because neither the participants nor the researchers know who is receiving the actual drug and who is receiving the placebo, minimizing both participant and researcher bias.

To Investigate the Effects of a New Drug for Hyperactivity