AP PSYCHOLOGY

Detailed explanation-1: -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-2: -The term for the specific case on the question is called a double-blind experiment. Here, both the participants and experimenters don’t know treatment allocations. Blinding is used when conducting experiments to eliminate bias that may arise due to participant’s expectations, observer’s effect on participants, etc.

Detailed explanation-3: -Quasi-experimental Research Design A quasi-experimental design is similar to a true experimental design. However, the difference between the two is the assignment of the control group. In this research design, an independent variable is manipulated, but the participants of a group are not randomly assigned.

Detailed explanation-4: -Definition. The double-blind design describes an experimental procedure in which neither the participant nor the experimenter are aware of which group (i.e., experimental or control) each participant belongs to.