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…
LIE DETECTOR
An apparatus designed to detect emotional changes that indicate guilt.Attempts to detect guilt on the basis of physical and psychological…
LEGAL PSYCHOLOGY (Forensic Psychology)
An area of applied psychology traditionally devoted to such problems as testimony, methods of interrogation, and guilt detection.In recent years…
LEAD POISONING
Lead poisoning is the most frequent type of metallic intoxication, and usually produces the most severe mental symptoms. It is…
LOCKE, JOHN (1632-1704)
Locke, the great empiricist and pioneer in associationist psychology, was born in Somerset, England, studied medicine and science at Oxford,…
LEARNING DURING SLEEP
The idea of learning while asleep is of considerable interest to scientists in their exploration of thinking processes. It is…
LEARNING TECHNIQUES
It is safe to say that no subject in the entire field of psychology has received more attention than the…
LEVEL OF ASPIRATION
The level at which a person sets his significant goals; the level of performance to which he aspires.An individual’s aspiration…
LEGAL PSYCHIATRY (Forensic Psychiatry)
There are many points where the provinces of psychiatry and the law impinge on each other. Some of the most…
MANGANESE POISONING
A toxic disorder produced by inhalation of volatile manganese; classified by the American Psychiatric Association (1952) under brain syndromes resulting…
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…
MAKE - A - PICTURE - STORY TEST (MAPS)
A projective test in which the subject tells stories about cardboard figures which he selects and places against a background.The…
MANIC-DEPRESSIVE REACTION (CIRCULAR AND MIXED TYPES)
Manic-depressive psychosis was long known as a cyclic or circular illness, but actually only 15 to 25 per cent of…
LEARNING (GENERAL)
A process in which new information, habits, or abilities are acquired; in general, any modification of behavior due to contact…
LEARNING ADDS
In recent years there has been a vast increase in the variety of available materials and techniques designed to enhance…
LEARNING PLATEAU
A flat place in a learning curve, indicating a period of little or no progress (Fig. 33).The occurrence and persistence…
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…
LEARNING UNDER HYPNOSIS
Hypnotic learning has not been fully explored, but a number of reported experiments show positive results. The first studies dealt…