23 The Enigma of Intelligence: History and Controversies

Intelligence: A Complex and Controversial Concept

Introduction

Defining intelligence is a nuanced and challenging endeavor, as it holds diverse meanings across cultures, ages, and skill sets. It cannot be simply quantified like physical attributes, leading to a myriad of questions about its influences, assessment, and whether it represents a single, general ability or a range of aptitudes. The history of intelligence testing is particularly "complex and dark," marked by controversial applications such as eugenics, making it one of the most hotly debated subjects in psychology.

Key Theories of Intelligence

The G-Factor: General Intelligence

• Charles Spearman's Contribution: Around the turn of the twentieth century, British psychologist Charles Spearman proposed the concept of "G-Factor," a comprehensive general intelligence that "underlies all of specific mental abilities." He argued that while individuals might possess "special talents like basket weaving or saxophone solos," these still fell under the umbrella of "G." Spearman also developed "factor analysis" to identify correlations between different skill clusters, such as spatial skills and numerical ability. The G-factor suggests that "people who do well on one kind of cognitive test tend to do well on others."
• L.L. Thurstone's Challenge and Unintended Confirmation: American psychometrics pioneer L.L. Thurstone initially challenged Spearman, administering "56 different tests to his subjects" to identify "seven clusters of mental abilities" (e.g., verbal comprehension, numerical ability). However, subsequent research on his findings inadvertently "backed up some evidence for some kind of G-factor," as high scores in one aptitude often correlated with good scores in others.

Multiple Intelligences: Beyond the G-Factor

• Howard Gardner's Theory: American psychologist Howard Gardner views intelligence as "multiple abilities that come in different forms." His theory is supported by observations of "brain damage where one ability may be destroyed while others stay perfectly intact" and the existence of "savants" who possess one exceptional ability despite limitations in others. Gardner proposes "eight intelligences, ranging from our skills with numbers and words to our ability to understand physical space and the natural world."
• Robert Sternberg's Triarchic Theory: American psychologist Robert Sternberg agrees with Gardner's concept of multiple intelligences but condenses them into three main types:
• Analytical intelligence: "problem-solving intelligence."
• Creative intelligence: "the ability to adapt to new situations."
• Practical intelligence: for "everyday tasks." Both Gardner and Sternberg's models are considered reasonable and have helped educators appreciate diverse student talents. However, even these different forms of intelligence appear to be "linked by some underlying general intelligence factor."

Less Tangible Forms of Intelligence

Creativity

• Definition and Measurement Challenges: Creativity is defined as "our ability to produce ideas that are both novel and valuable." Traditional intelligence tests struggle to account for creative solutions or "divergent thinking." While some tests exist for creative potential, there is "no standardized system for quantifying creativity."
• Sternberg's Five Components of Creativity (illustrated by Sherlock Holmes):

1. Expertise: "a well-developed base of knowledge," providing data to "work with and combine in new ways."
2. Imaginative Thinking Skills: the "ability to see things in new ways, recognize patterns and make connections."
3. Venturesome Personality: seeking "new experiences, tolerates risk, and perseveres in overcoming obstacles."
4. Intrinsic Motivation: driven by "own interest and sense of challenge," finding "pleasure from the work itself."
5. Creative Environment: "sparks, supports, and refines his ideas."

Emotional Intelligence

• Definition: Defined in 1997 by Peter Salovey and John Mayer, emotional intelligence is "the ability to perceive, understand, manage, and use emotions." This type of intelligence addresses the common observation that "plenty of smart people who have a hard time processing social information."
• Components of Emotional Intelligence:
• Perceiving emotions: recognizing them "in faces, and even in music, film, and stories."
• Understanding emotions: predicting them and "how they might change."
• Managing emotions: "appropriately express yourself in various situations."
• Using emotions: to "enable adaptive or creative thinking; like knowing how to manage conflict or comfort a grieving friend or work well with others." Like creativity, emotional intelligence can be measured to some extent, but "there's no standardized way to, like, assign a numerical value."

The Sordid History of Intelligence Testing and Eugenics

• Francis Galton and the Rise of Eugenics: In the 1800s, English scientist Francis Galton, inspired by Darwin's theories, proposed that intelligence was largely hereditary. He suggested that encouraging "smart people to breed with each other" could "essentially create a master race of geniuses." This "study of how to selectively and supposedly improve the human population, especially by encouraging breeding in some people and discouraging it in others, is called 'eugenics,' a term Galton himself coined."
• Alfred Binet and Theodore Simon's Original Intent: Commissioned by the French government to identify children needing extra help in school, Alfred Binet and Theodore Simon developed tests to measure "mental age," the "level of performance associated with a certain chronological age." Crucially, Binet "believed that his tests could measure a child's current mental abilities, but that intelligence wasn't a fixed, inborn thing." He hoped the tests would "improve children's education by identifying those who needed extra attention" and feared their misuse for "labeling children as 'lost causes,' limiting their opportunities."
• William Stern and the IQ Measurement: German psychologist William Stern used Binet and Simon's work to create the "intelligence quotient, or IQ measurement." Initially, IQ was calculated as "mental age, divided by your chronological age, multiplied by a hundred." This formula worked well for children but failed for adults.
• Lewis Terman and the Misuse of IQ Tests in the US: Stanford professor Lewis Terman "started promoting the widespread use of intelligence tests in the early 1900s." Unlike Binet, Terman used these scores as "a kind of label," believing they could "ultimately result in curtailing the reproduction of feeble-mindedness." This directly fueled the eugenics movement in the US, which received funding from prominent families and had proponents at major universities. Intelligence tests were used to "enforce the sterilization of about 60,000 people" in the first half of the 21st century, predominantly "poor white women, often unwed mothers or prostitutes," and later, "poor African American, Native American, or Latina women."
• Nazi Germany's Extremes: The Nazis embraced eugenics, using intelligence testing to select against "feeble-mindedness" and other "undesirable traits" to strengthen their perceived "Aryan nation." They "sterilized or simply executed hundreds of thousands of victims based off their answers to IQ test questions that were really more about adhering to social norms than measuring actual intelligence." This terrifying history continues to make many wary of how intelligence tests are administered and interpreted.

Conclusion

While intelligence appears to be a "real and measurable phenomenon," its precise definition and the interplay of "genetic, environmental, educational, and socio-economic components" remain largely untangled. The historical misuse of intelligence testing, particularly its ties to the eugenics movement and Nazi atrocities, has made the topic of intelligence "kind of controversial." There is still "a lot to learn" about intelligence, and ongoing challenges persist in its modern assessment.