Social Influence: Social influence refers to the impact that others have on an individual's thoughts, feelings, and behavior. It can include peer pressure, conformity, or obedience to authority.
Experimental Group: In an experiment examining teenage smoking attitudes, the experimental group would consist of participants who are exposed to some form of peer pressure manipulation or intervention related to smoking.
Control Group: The control group in such an experiment would be composed of participants who do not receive any specific manipulation or intervention regarding peer pressure and teenage smoking attitudes.