DrBishop Is Studying the Effects of a Drug on Memory

Multiple Choice

Dr.Bishop is studying the effects of a drug on memory.Half of his participants will receive the drug,while the other half will receive a placebo.The pills the two groups of participants will take look exactly the same.Dr.Bishop hopes that the use of a placebo will ____.

A) allow him to have control over the dependent variables
B) show if memory improvement is based on participant expectations
C) create a double-blind design for his research
D) eliminate the chance of random variables confounding his experiment