AP PSYCHOLOGY

Detailed explanation-1: -In double-blind trials, the treatment patients have is unknown to both patients and doctors until after the study is concluded. This differs from other types of trials, such as simple blind trials where only the patients are unaware of the treatment they are receiving, whereas the doctors know.

Detailed explanation-2: -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-3: -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.

Detailed explanation-4: -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-5: -It is called a double-blind because both groups of individuals involved in the study are unaware of what group they are in. This can be done via placebos in some instances, where the control group is given a placebo instead of the treatment.