Controversy of Intelligence: Crash Course Psychology #23

Key Concepts

• Intelligence: The ability to learn from experience, solve problems, and use knowledge to adapt to new situations.
• G-Factor (General Intelligence): A comprehensive general intelligence that underlies all specific mental abilities (Charles Spearman).
• Factor Analysis: A statistical procedure to determine how clusters of skills correlate (Charles Spearman).
• Multiple Intelligences: The theory that intelligence comes in different forms, including linguistic, logical-mathematical, musical, spatial, bodily-kinesthetic, interpersonal, intrapersonal, and naturalist (Howard Gardner).
• Triarchic Theory of Intelligence: Intelligence comprises analytical, creative, and practical aspects (Robert Sternberg).
• Creativity: The ability to produce ideas that are both novel and valuable.
• Divergent Thinking: Creative solutions that traditional intelligence tests cannot account for.
• Emotional Intelligence: The ability to perceive, understand, manage, and use emotions (Peter Salovey and John Mayer).
• Mental Age: The level of performance associated with a certain chronological age (Alfred Binet & Theodore Simon).
• Intelligence Quotient (IQ): A measurement initially calculated as mental age divided by chronological age, multiplied by 100 (William Stern).
• Eugenics: The study of how to selectively improve the human population, especially by encouraging breeding in some people and discouraging it in others (Francis Galton).

Defining Intelligence

• Intelligence is not a concrete thing but a concept.
• It's the ability to learn from experience, solve problems, and adapt to new situations.
• Defining intelligence is complex and varies across cultures, ages, and skill sets.
• Intelligence tests are used to assess and compare mental aptitude, but they have a controversial history.

Theories of Intelligence

Spearman's G-Factor

• Charles Spearman proposed the existence of a general intelligence factor (G-factor) that underlies all specific mental abilities.
• He conceded that people have special talents, but these still fall under "G".
• He used factor analysis to identify correlations between clusters of skills (e.g., spatial skills and numerical skills).
• The G-factor is connected to all intelligent behavior, from architecture to healing.
• People who do well on one cognitive test tend to do well on others, supporting the G-factor.

Thurstone's Multiple Primary Mental Abilities

• L.L. Thurstone challenged Spearman's single-scale ranking.
• He identified seven clusters of mental abilities through 56 different tests.
• These included verbal comprehension and numerical ability.
• However, follow-up research showed that high scores in one aptitude often correlated with good scores in others, providing some evidence for the G-factor.

Gardner's Multiple Intelligences

• Howard Gardner views intelligence as multiple abilities in different forms.
• Brain damage cases show that one ability can be destroyed while others remain intact.
• Savants have limited mental abilities but exceptional abilities in specific areas.
• Gardner believes in eight intelligences: linguistic, logical-mathematical, musical, spatial, bodily-kinesthetic, interpersonal, intrapersonal, and naturalist.

Sternberg's Triarchic Theory

• Robert Sternberg agrees with Gardner but boils intelligence down to three types:
  • Analytical Intelligence: Problem-solving skills.
  • Creative Intelligence: Ability to adapt to new situations.
  • Practical Intelligence: Skills for everyday tasks.
• Gardner and Sternberg's work helps teachers appreciate students' diverse talents.
• Research suggests that these different intelligences are linked by an underlying general intelligence factor.

Creativity

• Creativity is the ability to produce ideas that are both novel and valuable.
• Traditional intelligence tests cannot account for creative solutions (divergent thinking).
• There is no standardized system for quantifying creativity.
• Sternberg identified five components of creativity:
  • Expertise: A well-developed base of knowledge.
  • Imaginative Thinking Skills: Ability to see things in new ways and make connections.
  • Venturesome Personality: Seeking new experiences, tolerating risk, and persevering.
  • Intrinsic Motivation: Driven by interest and challenge.
  • Creative Environment: Sparks, supports, and refines ideas.
• Sherlock Holmes is presented as an example of someone with high levels of expertise, imaginative thinking skills, a venturesome personality, intrinsic motivation, and a creative environment.

Emotional Intelligence

• Emotional intelligence is the ability to perceive, understand, manage, and use emotions (Salovey & Mayer, 1997).
• It involves:
  • Perceiving Emotions: Recognizing emotions in faces, music, film, and stories.
  • Understanding Emotions: Predicting emotions and how they might change.
  • Managing Emotions: Expressing oneself appropriately in various situations.
  • Using Emotions: Enabling adaptive or creative thinking, managing conflict, comforting others, and working well with others.
• Emotional intelligence can be measured to some degree, but there is no standardized way to assign a numerical value.
• Sherlock Holmes is presented as an example of someone who is academically and creatively intelligent but emotionally unintelligent.

History of Intelligence Testing

Galton and Eugenics

• Francis Galton, inspired by Charles Darwin, believed intelligence was hereditary.
• He suggested encouraging smart people to breed to create a "master race" (eugenics).
• Eugenics is the study of selectively improving the human population by encouraging breeding in some and discouraging it in others.

Binet and Simon

• Alfred Binet and Theodore Simon were commissioned by the French government to develop a test to measure a child's mental age.
• Mental age is the level of performance associated with a certain chronological age.
• Binet believed intelligence was not fixed and could be raised with proper attention.
• He feared that his tests would be used to label children as "lost causes."

Stern and IQ

• William Stern used revisions of Binet and Simon's work to create the intelligence quotient (IQ).
• IQ was initially calculated as mental age divided by chronological age, multiplied by 100.
• This formula works for children but not adults.

Terman and the US Government

• Lewis Terman promoted the widespread use of intelligence tests in the US.
• The US government began administering intelligence tests to World War I army recruits and immigrants.
• Terman used these findings as labels and believed his tests could curtail the reproduction of "feeble-mindedness."

Eugenics Movement in the US

• Intelligence testing played into eugenicists' sensibilities.
• The eugenics movement gained support and funding from wealthy individuals and institutions.
• Intelligence tests were used to enforce the sterilization of about 60,000 people in the first half of the 20th century, primarily poor white women.
• There is evidence of forced or covert sterilizations of African American, Native American, and Latina women as recently as the 1970s.

Nazis and Eugenics

• The Nazis embraced eugenics and intelligence testing to select against "feeble-mindedness" and strengthen their "Aryan nation."
• They sterilized or executed hundreds of thousands of victims based on IQ test results that were more about adhering to social norms than measuring intelligence.

Conclusion

• Intelligence is a real and measurable phenomenon, but its genetic, environmental, educational, and socio-economic components are not fully understood.
• It's best to view intelligence as something about which we still have much to learn.
• The history of intelligence testing is controversial due to its association with eugenics and discriminatory practices.