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Intelligence is the mental capacity to reason, plan, solve problems, think abstractly, understand complex ideas, learn quickly, and learn from experience. This definition encompasses diverse cognitive abilities including verbal reasoning, mathematics, and spatial awareness. The concept reflects how individuals process information and adapt to new situations through introduction to cognitive psychology principles.

Charles Spearman introduced the g factor, or general intelligence, in 1904. He observed that children excelling in one academic area typically performed well in other subjects too. Spearman proposed that a single underlying factor of general intelligence supports success across different intellectual domains and cognitive abilities.

Intelligence is interpreted differently across cultures based on their values and priorities. Europeans often associate it with reasoning skills, while Americans emphasize broad cognitive capability and problem-solving. Kenyans view it as responsible family and social participation, and some cultures like Mandarin-speaking ones lack a single unified term for intelligence, using distinct words for specific abilities like wisdom instead.

Various cultures recognize intelligence through culturally specific abilities. In Uganda, intelligence involves knowing the right actions and executing them effectively. The Iatmul people of Papua New Guinea associate it with remembering detailed clan names, while the Caroline Islands link intelligence to mastery of celestial navigation, reflecting each culture's unique priorities and knowledge systems.

Intelligence's meaning is shaped by cultural values, priorities, and practices rather than being universally fixed. Western perspectives emphasize reasoning and cognitive task performance, while non-Western cultures prioritize social responsibility, practical knowledge, or specialized skills. This diversity demonstrates that intelligence is a culturally constructed concept reflecting what each society values most.

Western societies, particularly the United States, define intelligence as a broad ability to perform well in cognitive tasks, solve problems, and adapt to new situations. This contrasts with non-Western cultures that emphasize social participation, practical action, or specialized knowledge. The Western view, influenced by Spearman's general intelligence theory, treats intelligence as a unified underlying capacity.

Spearman observed that children who excelled in one academic subject often performed well in others, suggesting a single underlying factor contributed to various cognitive abilities. This pattern across different intellectual domains led him to propose that general intelligence supports success in diverse cognitive tasks, establishing the foundation for Western conceptualizations of intelligence through measures of intelligence.