Intelligence

Student SAT Scores Strongly Predict College Performance & Post-Grad Earnings

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Student cognitive abilities and college institutional factors both shape outcomes, but the historical evidence suggests student characteristics play an outsized role. Key Facts: In the research paper, student cognitive aptitude accounted for 41-47% of the variance in long-term salary outcomes. Institutional factors collectively accounted for more variance when entered first into models, suggesting both student …

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Perceived Intelligence in Psychopathy: Specific Traits Matter (Primary vs. Secondary)

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A new study published in the Journal of Personality suggests that individuals exhibiting secondary psychopathic traits are perceived as less intelligent than those with primary psychopathic traits. The research examined how laypeople view the intelligence of others based on psychopathic traits. Here are some key findings: Individuals described as exhibiting high secondary psychopathy traits (impulsivity, …

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Grandparents Smoking & High GDP Linked to Lower IQ for Grandchildren

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A study published in Wellcome Open Research has uncovered evidence that exposures experienced by grandparents, including smoking and economic conditions at the time of their birth, may be associated with reduced IQ scores in their grandchildren. The research suggests potential lasting impacts across multiple generations of certain harmful environmental factors. Key facts: The study found …

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Autism & IQ (Intelligence): Low, Average, or High?

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Autism spectrum disorder (ASD) is a complex condition characterized by challenges in social communication and repetitive behaviors. One aspect that contributes to the heterogeneity seen across the autism spectrum is differences in intelligence and cognitive abilities. Recent research is shining new light on the intelligence profiles of individuals with ASD, showing a shift away from …

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Birth Order & Educational Outcomes: Firstborns Outperform from Postnatal Environment – Not Genetics

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Siblings often turn out quite different from one another, despite sharing much of their genetics and childhood environment. One of the most robust findings in this realm is that earlier-born siblings tend to outperform later-borns in measures of intelligence and educational achievement. But what causes these birth order differences? Is it nature or nurture? A …

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Education Increases Intelligence? 1-5 IQ Points for Each Additional Year of Schooling

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Education has long been thought to improve cognitive abilities like intelligence. But does simply spending more years in school actually make people smarter? A new meta-analysis of quasi-experimental studies provides compelling evidence that education significantly increases intelligence test scores, by as much as 1-5 IQ points for each additional year of education. Key Facts: Education …

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IQ Scores & Well-Being Rankings in the United States (U.S.) (2022)

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A new study has uncovered an interconnected nexus between state IQ and well-being across the 50 U.S. states. Key findings show that states with higher average IQ tend to have better well-being outcomes across areas like health, income, education and crime. Some key facts: State IQ strongly predicts well-being – they correlated 0.80 in the …

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Albert Einstein’s Brain Connectivity: Corpus Callosum Significantly Thicker Than Average

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Albert Einstein’s extraordinary intelligence and genius have long intrigued scientists. Now, new analysis of photographs of Einstein’s brain reveals enhanced connections between the two hemispheres, providing clues into the neurological basis for his remarkable abilities. Key Facts: Researchers analyzed high-resolution photos of Einstein’s corpus callosum, the band of fibers connecting the brain’s hemispheres, and compared …

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Corpus Callosum Size, Thickness, & Intelligence (IQ): No Direct Link Found

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The corpus callosum is the thick band of nerve fibers that connects the left and right hemispheres of the brain, acting like a superhighway to allow communication between the two sides. Given its role in integrating information, researchers have long speculated that the size and structure of the corpus callosum may be linked to intellectual …

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