AP PSYCHOLOGY

Detailed explanation-1: -A double-blind study is one in which neither the participants nor the experimenters know who is receiving a particular treatment. This procedure is utilized to prevent bias in research results.

Detailed explanation-2: -A type of clinical trial in which neither the participants nor the researcher knows which treatment or intervention participants are receiving until the clinical trial is over. This makes results of the study less likely to be biased.

Detailed explanation-3: -Single-blind usually means that the research participant is not told of the treatment assignment. Double-blind usually means that the research participant, investigator, study coordinator/nurse, study sponsor, and in some cases the data analyst are kept unaware of the treatment assignment.

Detailed explanation-4: -Therefore, both research participants and researchers are blind to this information. Double-blind studies help in reducing the biases like the placebo effect, experimenter bias, and experimenter expectancy effect that hinder the results and conclusions of the study.

Detailed explanation-5: -What is Blinding in Statistics? In medical trials, the term blinding, or double-blind, usually refers to the practice of keeping patients in the dark as to whether they receive a placebo or not. It can also refer to allocation concealment, which is used to avoid selection bias.