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The term "intelligence" is complex because it refers to both behavior and individuals, and its interpretation varies across cultures. European Americans tend to link intelligence with reasoning and cognitive skills, while in Kenya, it is tied to responsible participation in family and social life. In Uganda, intelligence is seen as the ability to know the right actions and carry them out effectively, while the Iatmul people of Papua New Guinea associate it with the capacity to remember...
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Biological Influences on Intelligence01:30

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Intelligence is often thought to be linked to brain size, but the relationship is more complex than that. While brain size does correlate modestly with some abilities, like verbal skills, the connection is weaker for others, such as spatial reasoning. Other factors, like brain structure, also play crucial roles. For instance, despite Einstein's smaller-than-average brain, his parietal cortex, which is involved in spatial reasoning, was 15% wider, suggesting that neural density might matter...
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Despite the strong genetic influence on traits like intelligence, environmental factors significantly shape outcomes. For example, while over 90% of height variation is due to genetic differences, environmental factors such as nutrition also have a notable impact. Similarly, for intelligence, changes in a child's surroundings can significantly alter their IQ. Research shows that enriched environments boost children's academic success and help them develop key cognitive skills. Children...
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David Wechsler, a psychologist who worked with World War I veterans, developed a significant IQ test in 1939 called the Wechsler-Bellevue Intelligence Scale. This test was innovative because it combined several subtests that measured both verbal and nonverbal skills, reflecting Wechsler's belief that intelligence is a global capacity involving purposeful action, rational thinking, and effective interaction with the environment. This test later evolved into the Wechsler Adult Intelligence...
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Robert Sternberg's triarchic theory of intelligence posits that intelligence is composed of three distinct but interrelated components: analytical, creative, and practical intelligence.
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Utilizing Electroencephalography Measurements for Comparison of Task-Specific Neural Efficiencies: Spatial Intelligence Tasks
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The evolution of general intelligence.

Judith M Burkart1, Michèle N Schubiger2, Carel P van Schaik3

  • 1Department of Anthropology,University of Zurich,CH-8125 Zurich,SwitzerlandJudith.Burkart@aim.uzh.chhttp://www.aim.uzh.ch/de/Members/seniorlecturers/judithburkart.html.

The Behavioral and Brain Sciences
|July 29, 2016
PubMed
Summary
This summary is machine-generated.

General intelligence in animals is an evolutionary puzzle. Studies suggest mammals possess general intelligence, supporting theories emphasizing social learning and cognitive development.

Keywords:
brain size evolutioncomparative approachcultural intelligenceevolution of intelligencegeneral intelligencemodularitynonhuman primatespositive manifoldpsychometric intelligencerodentssocial learningspecies comparisons

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Area of Science:

  • Cognitive Evolution
  • Comparative Psychology
  • Animal Cognition

Background:

  • General intelligence is a significant evolutionary question.
  • Increased interest in nonhuman animal general intelligence.

Purpose of the Study:

  • Critically evaluate general intelligence in nonhuman animals.
  • Explore implications for cognitive evolution theories.
  • Situate nonhuman general intelligence within human cognitive models.

Main Methods:

  • Review domain-general and domain-specific human cognition accounts.
  • Analyze recent studies on mammal cognition (rodents, primates).
  • Propose validation tests for psychometric g factor in primates.

Main Results:

  • Recent studies suggest general intelligence in mammals.
  • The interpretation of a psychometric g factor requires validation.
  • Support found for the cultural intelligence approach.

Conclusions:

  • General intelligence in nonhumans supports the cultural intelligence approach.
  • Modular abilities arise through automatic development or learning.
  • The mind is a mix of primary and secondary modules, varying by species.