You Want to Test People's Reactions to a New Artificial

Multiple Choice

You want to test people's reactions to a new artificial sweetener,and so you give them coffee with two different kinds of sweetener.Although you know which sweetener is which,you don't let them know which sweetener is the one they're getting.This type of experiment is called a __________ experiment.

A) double-blind
B) single-blind
C) placebo effect
D) placebo bias