Cognitive Dissonance Theory - When people hold contradictory beliefs or attitudes, they experience psychological discomfort and are motivated to reduce this dissonance by changing their beliefs, attitudes, or behaviors.

Social Learning Theory - People learn behaviors, attitudes, and emotional reactions through observing others, not just through direct experience. Emphasizes modeling, imitation, and vicarious reinforcement.

Social Identity Theory - People derive part of their self-concept from their membership in social groups. This creates in-group favoritism and out-group discrimination as people seek positive social identity.

Optimal Arousal Theory - Performance is best when arousal levels are moderate - too little arousal leads to boredom, too much leads to anxiety. The optimal level varies by task complexity.

Sensation Seeking Theory - Some people have a biological need for varied, novel, complex, and intense sensations and experiences, leading them to take physical, social, legal, or financial risks.

Self-Determination Theory - People have three basic psychological needs: autonomy (feeling volitional), competence (feeling effective), and relatedness (feeling connected). Meeting these needs promotes intrinsic motivation and well-being.

Terror Management Theory - Awareness of death creates existential anxiety that people manage through cultural worldviews and self-esteem, which provide meaning and symbolic immortality.

Stress Inoculation Training - A therapeutic approach that builds coping skills by gradually exposing people to manageable levels of stress, like a psychological "vaccine."

Psychological reactance (autonomy threats)