HORNEY, KAREN (1885-1952)

as a Freudian analyst. She came to this country in the early 1930s, and soon after founded an association and training institute which she...

HOSTILITY

Persistent anger accompanied by an intense urge to retaliate.Hostility is a common feature of normal behavior but may also be a major factor in...

HALLUCINOGEN

A drug or other substance that is capable of producing hallucinationsAlthough hallucinogenic chemicals have been utilized for both experimental and therapeutic purposes in Western...

HALO EFFECT

The tendency to allow one characteristic of an individual to influence our judgment of other characteristicsThe halo effect may work positively or negatively. If...

HEAD INJURY (ACUTE TRAUMATIC DISORDERS)

A temporary impairment of brain functions immediately following a severe blow to the head.The problem of head injury has been on the increase in...

HEAD INJURY (CHRONIC TRAUMATIC DISORDERS)

A permanent or relatively permanent impairment inHEAD INJURY (CHRONIC TRAUMATIC DISORDERS)brain functions resulting from a severe blow to the head. Chronic, or “post- traumatic,”...

HEARING (AUDITION)

Despite the claim that 90 per cent of our information input is visual, hearing is a close second to vision in terms of knowledge...

HEARING

Theories of hearing must explain both the wide range of pitch—from 20 to 20,000 cycles per second—and the full range of intensity or loudness...

HELMHOLTZ, HERMANN LUDWIG FERDINAND VON (1821-94)

This remarkably versatile scientist, who made many pioneering contributions to physiological psychology, was bom in Potsdam, Germany, and was educated at the Friedrich-Wilhelm Institute...

HEPATOLENTICULAR DEGENERATION

A rare disorder involving severe damage to the brain and liver due to a deficiency of copper metabolism. It is one of the causes...

Latest news