AP PSYCHOLOGY

Detailed explanation-1: -What is the difference between a control group and an experimental group? An experimental group, also known as a treatment group, receives the treatment whose effect researchers wish to study, whereas a control group does not.

Detailed explanation-2: -a control group whose members are not exposed to any experimental manipulation or intervention, thus serving as a neutral comparison for study groups receiving the treatment under investigation.

Detailed explanation-3: -The three main types of controls are positive, negative, and experimental controls.

Detailed explanation-4: -In the absence of a control group, the researcher’s ability to draw conclusions about the new drug is greatly weakened, due to the placebo effect and other threats to validity.

Detailed explanation-5: -Unlike the experimental group, the control group is not exposed to the independent variable under investigation and so provides a base line against which any changes in the experimental group can be compared.