Psychology

State of dependence caused by frequent and regular use of drugs, alcohol, or other substances. It is characterized by uncontrolled craving, tolerance, and symptoms of withdrawal when access is denied.

Anticipatory tension or vague dread persisting in the absence of a specific threat. In contrast to fear, which is a realistic reaction to actual danger, anxiety is generally related to an unconscious threat.

From The Concise Corsini Encyclopedia of Psychology and Behavioral Science
Biofeedback is best understood as a closed feedback loop consisting of a person or other animal, a response, a means to detect the response, and a mechanism for displaying the response to the person or animal—the response is thus fed back.

From Encyclopaedic Dictionary of Psychology
The discovery of classical conditioning is attributed to Pavlov, who famously trained dogs to salivate when presented with a bell. Naturally, dogs will salivate when presented with food, in order to facilitate digestion.

The state of being aware of oneself and one's surroundings, without hindrance from sleep, illness, drugs, or hypnotism.

Cessation of all life (metabolic) processes. Death may involve the organism as a whole (somatic death) or may be confined to cells and tissues within the organism.

Mental activity associated with the rapid-eye-movement (REM) period of sleep. It is commonly made up of a number of visual images, scenes or thoughts expressed in terms of seeing rather than in those of the other senses or in words.

Over the last 10 years, the field of psychology has witnessed an increased interest in emotional processes.

In philosophy, the study and evaluation of human conduct in the light of moral principles.

Hallucinations are involuntary sensory experiences that are perceived as emanating from the external environment, in the absence of stimulation of relevant sensory receptors.

In psychology, the general mental ability involved in calculating, reasoning, perceiving relationships and analogies, learning quickly, storing and retrieving information, using language fluently, classifying, generalizing, and adjusting to new situations.

Systematic communication by vocal symbols. It is a universal characteristic of the human species.

Memory is the mental capacity to store and retrieve stored experiences. It is a central part of the human capacity because it is vital to the self-identity of a person.

Well-being and soundness of mind, not only in terms of intellectual abilities, but also in terms of the capability to deal with everyday problems, and the capacity to get on well with other people and to form and sustain relationships.

From The Hutchinson Unabridged Encyclopedia
A mnemonic (pronounced nemonic) is any device or method that helps memory. The word ‘mnemonic’ comes from the name Mnemosyne, who was the Greek goddess of memory.

In psychology, the intention of achieving a goal, leading to goal-directed behavior. Some human activity seems to be best explained by postulating an inner directing drive.

Phenomenon reported by some people who have been clinically dead, then returned to life.

In psychology, mental organization and interpretation of sensory information.

In psychology, the patterns of behavior, thought, and emotion unique to an individual, and the ways they interact to help or hinder the adjustment of a person to other people and situations.

Branch of medicine that concerns the diagnosis and treatment of mental, emotional, and behavioral disorders, including major depression, schizophrenia, and anxiety.

Science or study of the thought processes and behavior of humans and other animals in their interaction with the environment.

Resting state in which an individual becomes relatively quiescent and relatively unaware of the environment.