Question

In an experiment, neither the experimenter nor the subjects know what treatment condition they are in (e.g., whether they are in the experimental or control group). What has occurred?

Answer 1

A blind experiment occurs when both the experimenter and the subjects are unaware of the treatment conditions in an experiment. It helps prevent bias in the outcome and ensures fair treatment of the groups. This type of experiment can be single-blind or double-blind.

Step-by-step explanation:

In an experiment, when neither the experimenter nor the subjects know what treatment condition they are in, it is called a blind experiment. This is done to avoid bias in the outcome of the experiment. It helps prevent the experimenter's expectations or beliefs from influencing the results and ensures that the treatment groups are treated equally. This type of experiment can be single-blind, where only the subjects are unaware of their group, or double-blind, where both the subjects and the researchers are unaware.