Intelligence part 1

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Stanford-Binet Test Creators

Lewis Terman and David Wechsler (Wechsler developed deviation IQ as a solution to its limitations, not a co-creator of the original test)

Stanford-Binet IQ Calculation Formula

$$IQ = (Mental Age / Chronological Age) x 100$$

Problem with Mental Age in IQ Calculation

Mental age staggers while chronological age does not, leading to inaccuracies for adults.

Solution to Mental Age Problem

Wechsler developed the concept of deviation IQ.

Francis Galton (1869)

Discussed 'Hereditary Genius,' introduced correlation, percentile test scores, and concepts of eugenics.

Alfred Binet and Theodore Simon (1905)

Created the Binet-Simon Intelligence Scale focusing on mental age.

Stanford-Binet Intelligence Scale Establishment (1916)

Refined methods of intelligence measurement based on Binet's work.

WAIS (Wechsler Adult Intelligence Scale)

Measures cognitive ability and detects non-obvious patterns of thought; a performance-based measure.

Ravens Progressive Matrices

A pattern inference tool used to assess intelligence; a performance-based measure.

Self-enhancement bias

Tendency to overestimate one's performance, a conceptual difficulty in defining intelligence.

Definition of Intelligence

The ability to discern true or significant information from irrelevant data, enhance explanations of complex situations, and exhibit behavioral flexibility. Also, gaining knowledge through learning and problem-solving.

Practical Wisdom

Application of knowledge in real-world scenarios, a dimension of intelligence.

Theoretical Wisdom

Profound understanding of ideas across varying contexts, a dimension of intelligence.

Nous (Aristotle)

Intellect, encompassing reasoning that is both cross-contextual and contextually sensitive.

The Flynn Effect

Research showing IQ scores increasing over time, attributed to environmental factors.

Causes of Rising IQ Scores

Improvements in nutrition and medical care, education emphasizing abstract thinking, and increased environmental complexity.

Early Intelligence Measures Purpose

To predict performance in academic and work environments.

Variability

The extent to which scores differ from the mean, commonly measured using standard deviation.

Binet and Simon's Definition of Intelligence

'To judge well, comprehend well, and reason well.'

Binet's Basic Abilities for Intelligence

Direction (knowing what to do), adaptation (creating strategies), and criticism (evaluating one's thinking).

Wechsler's Deviation IQ

Normalized around an average of 100 with a standard deviation of 15, reflecting how far a person's performance deviates from age group averages.

Inspection Time Testing

Nettelbeck and Lalley’s proposal that speed of identifying line lengths measures intelligence.

Arthur Jensen's Hypothesis

Speed of neuronal conduction correlates with intelligence; faster neurons lead to higher IQ scores.

Choice Reaction Time

A behavioral measure where faster responses to stimuli correlate with higher IQ scores.

Eugenics Movement

Originating in the early 1900s, advocated by Terman to prevent reproduction among 'less desirable' individuals based on IQ.

Bias in Terman's Tests

Favored respondents familiar with English and American culture, lacking cultural neutrality.

Culturally Neutral Tests

Aim to reduce bias by minimizing reliance on specific cultural knowledge, vocabulary, or problem-solving styles.

Stereotype Threat Theory

Anxiety about confirming negative stereotypes can impinge on test performance.

Modern Factors Influencing Intelligence

Genetics, environment, education, and randomness.

Reliability of Intelligence Tests

Consistency of test results over time.

Validity of Intelligence Tests

Tests must measure what they claim to measure.

Mindset and Anxiety Impact on Performance

Essential factors affecting performance; mindfulness practices may improve cognitive function and intelligence outcomes.