Intelligence pt 2

Average Intelligence and IQ Distributions

• Most people are classified as average in terms of intelligence.

  • Mean IQ: Set at 100 (constant adjustments made to maintain this mean).

  • Standard Deviation: 15.

• Distribution of IQ Scores:

  • Approximately 70% of the population scores within one standard deviation from the mean (i.e., between 85 and 115).

  • A vast majority fall within two standard deviations (i.e., between 70 and 130).

  • Most people exhibit similar intelligence levels; hence, most people are considered average.

• Confidence in Test Scores:

  • Current best practices for reporting IQ scores suggest providing a range (e.g., a score between 85 to 100) rather than a specific number.

  • Emphasis should be on whether the score falls within a range that requires extra educational support or stimulation rather than fixating on an exact figure.

• Tails of the Distribution:

  • A small percentage of individuals at the lower end are classified as having intellectual disabilities.

  • Conversely, a small percentage at the higher end are what may colloquially be called geniuses.

  • Processing information may differ significantly among these individuals.

Intelligence Testing and Multiple Facets

• General Intelligence (g):

  • General intelligence encompasses various facets such as verbal fluency, mathematical skills, and working memory.

  • Generally, there's a positive correlation among different intelligence facets, though exceptions exist (e.g., someone might score high in verbal but low in mathematical skills).

• Individual Variability:

  • Individuals may demonstrate varied skills across different intelligence domains (e.g., excellent in one area, weaker in another).

  • Importance of recognizing personal strengths and weaknesses in intelligence assessments for development and growth.

Genetic and Environmental Influences on Intelligence

• Genetics vs. Environment:

  • Twin and adoption studies indicate that genetics significantly influences intelligence, often termed as 'pretty heritable' meanings with considerable variability explained by genetic factors.

  • genes do play a role in intelligence and its polygenic means theres many genes that play a role

  • Environmental influences also play a critical role in shaping intelligence.

  • Acknowledgment that intelligence is not solely determined by genetic factors; ongoing environmental influences, pre- and post-natally, contribute significantly.

• Interactions:

  • Genes and the environment interact to shape intelligence. Factors influencing interaction warrant detailed consideration in assessments.

• Growth Mindset:

  • The concept of a growth mindset has been a key research area, affirming that abilities can improve with effort and attitude.

  • Potential coverage of this aspect in future classes, suggesting its importance over time.

Misuse of Intelligence Data

• Historical misuse of intelligence data:

  • Discussions around Sir Francis Galton's ideas and their potential use to justify harmful social policies (e.g., eugenics, cutting educational funding for impoverished communities).

  • Emphasizes that IQ is not fixed and can be influenced through various interventions.

  • peoples iqs are not fixed at birth or through school and there is no known limit to how high average igs can go

The Flynn Effect

our iq steadily increases over time

• Overview:

  • The Flynn Effect refers to the observed a historical increase in IQ scores over time, approximately 3 points per decade.

  • Claims that average IQ has increased by about 30 points over the last century.

• Fluid vs. Crystallized Intelligence:

  • Fluid Intelligence: Refers to the ability to solve problems and think abstractly without relying on prior knowledge.

  • Crystallized Intelligence: Refers to the use of learned knowledge and experiences.

  • Both types have reportedly increased, contributing to rising IQ test scores.

• Contributing Factors:

  • Possible reasons for the Flynn Effect include better nutrition, education, and exposure to complex environments compared to previous generations.

  • Impact of modern technology allowing continual cognitive processing and problem-solving in various contexts (e.g., smartphones, the Internet).

• Current Trends:

  • Recent findings suggest a potential reversal in the Flynn Effect in some developed countries, impacting average intelligence levels.

  • Poses questions on the effectiveness of education and whether improvements in test performance have plateaued.

  • Some researchers express concern regarding cognitive degeneration due to technological dependencies.

Environmental Factors Influencing Intelligence

• Negative Influences (Constraining Intelligence):

  • High-stress childhoods can have small but variable impacts on cognitive development.

  • Unstimulating environments, environmental toxins (e.g. exposure to lead), and lack of educational resources can hinder intelligence potential, poor nutrition, and diseases.

• Positive Influences:

  • Educational advancements contribute positively to intelligence development; higher educational levels lead to higher IQ scores.

  • Educational environments that challenge students mentally and intellectually stimulate development.

  • spending time studying make you smarter

  • Certain medications may enhance cognitive performance (e.g., treatments for ADHD), raising ethical questions about accessibility and fairness.

• Research and Development:

  • Ongoing studies provide deep insights into how both genetic and environmental factors shape cognitive abilities, emphasizing the actionable nature of environmental modifications to enhance intelligence.