LOCKE, JOHN (1632-1704)

Locke, the great empiricist and pioneer in associationist psychology, was born in Somerset, England, studied medicine and science at Oxford, and later became adviser...

LOGORRHEA (Logomania,Hyperlogia,Hyperphrasia)

Excessive, uncontrollable talking, often highly incoherent.Logorrhea occurs in states of pathological excitement, particularly in the manic phase of manic-depressive psychosis where one of the...

LOVE

A complex yet basically unified emotion comprising tenderness, affection, and devotion to the well-being of another person or persons.In more specific terms, love involves...

LUPUS ERYTHEMATOSUS Giterally, wolf-red inflammation)

A collagen, or connective tissue, disease of unknown cause affecting small blood vessels in various organs of the body, including the brain; classified by...

LYING

Lying may take either a normal or pathological form, and will therefore be discussed as (a) a feature of the moral development of the...

LEAD POISONING

Lead poisoning is the most frequent type of metallic intoxication, and usually produces the most severe mental symptoms. It is classified by the American...

LYSERGIC ACID (LSD)

A powerful hallucinogenic, “mind-expanding” drug used for experimental and therapeutic purposes.In its natural form, lysergic acid diethylamide, LSD-25, is a derivative of ergot, a...

LEARNING ADDS

In recent years there has been a vast increase in the variety of available materials and techniques designed to enhance the learning process. The...

LEARNING DURING SLEEP

The idea of learning while asleep is of considerable interest to scientists in their exploration of thinking processes. It is also attractive to practical-minded...

LEARNING (GENERAL)

A process in which new information, habits, or abilities are acquired; in general, any modification of behavior due to contact with the environment.Animals and...

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