the concept that people are prone to exert less effort on a task if they are in a group versus when they work alone

explains mental disorders as the result of interactions among biological, psychological, and social factors

An experiment in which neither the participant nor the researcher knows whether the participant has received the treatment or the placebo

Prosocial behavior that is done with no expectation/reward and may involve risk of harm to oneself

The perspective through which it is believed different traits within any individual are a result of our ancestors adapting for survival and reproduction

Changing one's behavior at the direct order of an authority figure.

Type of information processing that involves attending to the conent of the message itself (type of persuasion)

When people change their behavior as a result of another person or group asking or directing them to change

A technique for ascertaining the self-reported attitudes or behaviors of people, usually by questioning a representative, random sample of them

refers to the tendency for a group to make decisions that are more extreme than the initial inclination of its members.

The process by which one person tries to change the belief, opinion, position, or course of action of another person through argument, pleading, or explanation

A measure of the extent to which two factors vary together, and thus of how well either factor predicts the other. The correlation coefficient is the mathematical expression of the relationship, ranging from -1 to +1j

An observation technique in which one person is studied in depth in the hope of revealing universal principles