Intelligence

Intelligence can apply to a behavior or person; defining it in relation to a person can be complex.
Cultural Perspectives:
- European Americans: Intelligent behavior linked to reasoning and thinking skills.
- Kenyans: Involves responsible participation in family and social life.
- Caroline Islands residents: Navigating by stars as a key intelligence trait.

Charles Spearman (1904): Proposed that intelligence is a general ability, termed as g, which affects performance across various cognitive areas (math, verbal, abstract reasoning).
Empirical evidence supports the concept of generalized intelligence in various cultures (Latin America, Japanese children).
- Mixed results were found in meta-analyses with different group comparisons (prisoners, ethnic groups).
- Savant syndrome challenges the assumption of g by displaying singular extraordinary abilities amidst overall cognitive deficits.

IQ (Intelligence Quotient) is used to quantify intelligence through standardized tests.

Validity:
- Measures what it intends; predictive of performance in relevant tasks (e.g., school grades).
Reliability:
- Produces consistent scores over repeated measures; stability over time is essential for validity.
Standardization:
- Involves uniform administration and scoring procedures; norms established from representative populations.

Alfred Binet: Developed the first intelligence test (Stanford Binet) to identify students needing alternative learning methods.
- Introduced Mental Age (MA): Comparing cognitive ability with age norms.
William Stern: Introduced IQ formula: IQ = \frac{MA}{CA} \times 100
- CA: Chronological Age.

Wechsler Scales:
- WAIS (for 16+), WISC (for ages 6-16), WPPSI (as young as 2.5).
- Includes verbal and performance tasks, providing detailed scores in various skill areas.

Cultural Bias:
- Early tests favored certain cultures; minority groups may struggle with standard English or culturally specific contexts.
- Attempts for culture-fair tests, but challenges remain due to cultural context relevance.
Reliability and Validity Concerns:
- Differences across demographics (race, geography) due to external factors unrelated to intelligence, such as socio-economic status.

Heritability: Influences estimates around 75%; however, applied to groups, not individuals.
- Requires clarification; environmental factors can play a significant role.
Environmental Factors Impacting IQ:
- Four key interventions:
1. Dietary Supplements: Omega-3 fatty acids increase IQ by ~3.5 points.
2. Early Education Programs: Increase IQ by ~4 points for disadvantaged youth.
3. Interactive Reading: Can increase IQ by over 6 points when parents engage with children actively.
4. Preschool Attendance: Linked to ~4 points increase in IQ, with potentially higher for disadvantaged children.

Flynn Effect: Rising IQ scores over generations due to increased education and environmental factors.
- Even those who are gifted show rising scores, suggesting growing capacity for learning and cognition.

Gifted Individuals: Defined as IQ 130 or higher; historically studied by Lewis Terman (termite study), showing success in academia and professions.
- Current gifted research indicates creativity and innovative achievements in adulthood.
Low Intelligence (Intellectual Challenges):
- Identified through deficits in conceptual, social, and practical skills; can stem from organic causes (e.g., Down syndrome) or cultural factors.
- Classification systems based on IQ may not predict the functional abilities of individuals with similar scores.

Suggestion that intelligence is not singular but can exist in various forms beyond academic achievement, encouraging broader definitions of capabilities and intelligence assessment.