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

Question

Quizplus · Accepted Answer

A single-blind experiment is where the participants are not aware of which treatment they are receiving, but the experimenter knows. In this case, the experimenter knows which sweetener is in each coffee, but the participants do not know. A double-blind experiment is where both the participants and experimenter are unaware of which treatment is being given. Placebo effect refers to when a participant's belief in a treatment affects their response, and placebo bias refers to the bias that can be introduced by participants' expectations or beliefs about a treatment.

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