Dr. Sullivan is conducting a clinical trial to determine if vitamin Z 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 Z and the control group a “sugar pill” that tastes and looks identical to the vitamin Z capsule. Neither Dr. Sullivan nor the participants knows who is receiving which treatment. This experiment is BEST described as
A. single-blind, random selection.
B. double-blind, placebo-controlled.
C. single-blind, random selection, placebo-controlled.
D. double-blind, random selection, placebo-controlled.
Answer:D
Dr. Sullivan is conducting a clinical trial to determine if vitamin Z 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 Z and the control group a “sugar pill” that tastes and looks identical to the vitamin Z capsule. Neither Dr. Sullivan nor the participants knows who is receiving which treatment. This experiment is BEST described as
A. single-blind, random selection. B. double-blind, placebo-controlled. C. single-blind, random selection, placebo-controlled. D. double-blind, random selection, placebo-controlled.