1. a theory, usually including a mechanism for predicting psychological outcomes, intended to explain specific psychological processes.

Freud’s Psychosexual Developmental Theory Freud proposed one of the best-known grand theories of child development. According to Freud’s psychosexual theory, child development occurs in a series of stages focused on different pleasure areas of the body.

List of Popular Theories of Psychology

• Piaget Theory of Development: Stages of Intellectual Development:
• Kohlberg’s Theory of Moral Development:
• Spearman’s Two-Factor Theory:
• Thurstone’s Multiple Factor Theory (P.M.A.):
• Cannon’s Theory:
• The Psycho-Analytic Theory (Freud):
• The Constitutional Theory (Sheldon):

Summary

• Anxiety disorders, including panic disorder, obsessive-compulsive disorder, and phobias.
• Depression, bipolar disorder, and other mood disorders.
• Eating disorders.
• Personality disorders.
• Post-traumatic stress disorder.
• Psychotic disorders, including schizophrenia.

10 Psychological Effects That Affect Our Behavior

• The Anchoring Effect.
• Deflection to the Result.
• The Paradox of Choice.
• Clustering Illusion.
• Pratfall Effect.
• The Kuleshov Effect.
• “Body Negative”
• Survivorship Bias.

Physiological Effects of Drugs. Activities which affect organs and systemic functions without regard to a particular disease.

A

• Abscopal effect (cancer treatments) (immune system) (medical treatments) (radiation therapy)
• Accelerator effect (economics)
• Accordion effect (physics) (waves)
• Acousto-optic effect (nonlinear optics) (waves)
• Additive genetic effects (genetics)
• Aharonov–Bohm effect (quantum mechanics)