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Psychology Glossary: P Index

These are brief definitions of psychology terms beginning with P. Click on the term for a more detailed definition.
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

Panic Disorder Definition
A panic disorder is a type of anxiety disorder that can be severe and even debilitating. Learn more about what a panic disorder is and some of the common symptoms...

Paranoid Personality Disorder Definition
Paranoid personality disorder is a chronic and pervasive condition characterized by disruptive patterns of thought, behavior, and functioning...

Parapsychology Definition
Parapsychology is a fairly controversial area that is often described as a pseudoscience. Learn more about what topics parapsychology studies and discover links to further information.

Passive-Aggressive Behavior Definition
Passive-aggressiveness is a type of behavior that involves using indirect aggression towards others.

Peripheral Nervous System Definition
The peripheral nervous system is the division of the nervous system containing all the nerves that lie outside of the central nervous system. Learn more about the structure and function of the peripheral nervous system...

Personality Definition
Personality is made up the characteristic patterns of thoughts, feelings, and behaviors that make a person unique...

Personality Disorder Definition
According to the Diagnostic and Statistical Manual (DSM-IV), a personality disorder is an "enduring pattern of inner experience and behavior that deviates markedly from the expectation of the individual's culture, is pervasive and inflexible, has an onset in adolescence or early adulthood, is stable over time, and leads to distress or...

Persuasion Definition
When you think about persuasion, what comes to mind? Learn more about how experts define persuasion and how contemporary persuasion differs from the past.

Phallic Stage Definition
The phallic stage is the third stage of psychosexual development during which the libido's energy is focused on the genitals.

Phobia Definition
According to the American Psychiatric Association, a phobia is an irrational and excessive fear of an object or situation...

Placebo Effect Definition
You might often hear about placebo effects, but do you know what these responses are and what causes them? Discover what researchers have learned about the placebo effect via PET scans.

Pleasure Principle Definition
In Freud?s psychoanalytic theory of personality, the pleasure principle is the driving force of the id...

Positive Reinforcement Definition
Positive reinforcement is often used in operant conditioning to increase the likelihood that behaviors will occur. Find examples and learn more about how positive reinforcement works.

Preconscious Definition
In Freud?s psychoanalytic theory of personality, the preconscious mind is part of the conscious mind and includes our memory...

Prejudice Definition
Prejudice is a baseless and usually negative attitude toward members of a group. Learn more about types of prejudice and ways to reduce it.

Preoperational Stage Definition
The preoperational stage occurs between the ages of 2 and 6.

Primary Process Definition
In Freud?s psychoanalytic theory of personality, the primary process works to resolve tension created by the pleasure principle...

Priming Definition
Priming involves an increased sensitivity to particular stimuli as a result of previous experience.

Problem-Solving Definition
Problem-solving is a mental process that involves discovering, analyzing and solving problems...

Procedural Memory Definition
Procedural memory involves the memory of how to perform tasks.

Projection Definition
Projection is a defense mechanism that involves ascribing our own feelings to other people...

Prosocial Behavior Definition
Prosocial behaviors are those designed solely to help other people...

Psychoanalytic Therapy Definition
Psychoanalytic therapy is one of the most well-known treatment modalities, but it is also one of the most misunderstood by mental health consumers. This type of therapy is based upon the theories and work of Sigmund Freud, who founded the school of psychology known as psychoanalysis.

Psychology Definition
Psychology is both an applied and academic field that studies the human mind and behavior...

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