Dr.Sullivan is conducting a clinical trial to determine if vitamin XX can improve test performance of students in an introductory college nutrition course.Dr.Sullivan puts all the students' names in a hat and draws names to determine if they will be placed in the control or the experimental group.The experimental group receives a capsule of vitamin XX and the control group a "sugar pill" that tastes and looks identical to the vitamin XX capsule.Neither Dr.Sullivan nor the participants know who is receiving which treatment.This experiment is best described as:
A)single-blind,randomized.
B)double-blind,placebo controlled.
C)single-blind,randomized,placebo controlled.
D)double-blind,randomized,placebo controlled.

Question

Quizplus · Accepted Answer

This experiment is double-blind, as both the participants and the researcher are unaware of which group is receiving the treatment and which is receiving the placebo. It is also randomized, because the participants are chosen by random selection, and placebo-controlled, because the control group receives a placebo instead of the treatment.

DrSullivan Is Conducting a Clinical Trial to Determine If Vitamin