Intelligence

Intelligence is the mental ability by which a person or other entity learns, understands, and uses information in order to grasp new situations and solve problems. The term is applied to humans, animals, and also to computer systems that perform intelligent tasks.

There is no single definition accepted by researchers. Some emphasize the ability to reason and think logically, while others include social skills, creativity, and emotional regulation. These differences in definition affect how intelligence is measured.

Theories of intelligence

Some researchers have proposed that there is a general factor of intelligence that underlies all cognitive abilities. Others hold that intelligence consists of several independent abilities, such as linguistic ability, numeracy, visual-spatial thinking, and working memory. There are also theories that define intelligence as three components: analysis, insight, and practical application.

Measurement

Intelligence tests assign a score known as IQ, which measures how an individual performs relative to their age group. These tests have been criticized for being influenced by culture, education, and language, which can affect comparisons across different populations. For this reason, test results are viewed as measuring only some aspects of a person's cognitive abilities.

Nature and environment

Extensive research has shown that both nature and environment influence differences in cognitive abilities. Nutrition, health, quality of education, and socioeconomic conditions correlate with test outcomes. Questions about the effects of heredity remain scientifically disputed, particularly when comparing different social groups.