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.In order to minimize both research participant bias and researcher bias, this experimenter has his assistant label the drug and the placebo with a letter name 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 single-blind experiment.
B)a double-blind experiment.
C)random selection.
D)random assignment.

Question

Quizplus · Accepted Answer

The experimenter is using a double-blind experiment by having his assistant label the drug and the placebo so that neither the researcher nor the participants know which group is receiving the drug or the placebo. This helps to avoid both researcher bias and participant bias. Random selection and random assignment are important in experimental design, but they are not specifically utilized in this scenario.

To Investigate the Effects of a New Drug for Hyperactivity