Linos and Severnini found that exposure to pollution above their threshold shifts a person's Lumosity percentile ranking by about 6 points on average.
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At 41:40 · chapter starts 40:15
Acknowledging he's not a medical expert, Severnini synthesizes the biomedical literature: air pollution impairs the brain through two routes. The first is direct — fine particles are small enough to pass through the blood-brain barrier and directly disrupt neuronal function. The second is indirect — particles stimulate the release of pro-inflammatory cytokines, triggering systemic inflammation, oxidative stress, and ultimately neuron loss. Researchers studying this topic consistently observe these same processes: oxidative stress, inflammation, and neuronal damage. Together, these mechanisms explain how short-term variation in pollution exposure — the kind Linos and Severnini measure with daily gameplay data — can translate into measurable shifts in cognitive test scores.
Dan Gilbert's research found that the psychological immune system — the brain's ability to justify and find satisfaction in choices — activates most powerfully when a decision is perceived as irreversible.
Barry Schwartz's research found that maximizers — people who try to optimize every decision — tend to achieve objectively better outcomes but report lower happiness than satisficers who choose 'good enough.'
Research consistently shows that while people may initially regret poor decisions, in the long run they regret the decisions they didn't make — inaction — far more than the ones they took.
A study showed that men in committed relationships who briefly viewed 10 attractive women's faces reported a measurable decrease in relationship satisfaction immediately afterward, illustrating evolutionary mismatch with modern media.
Harvard psychologist Dan Gilbert, who previously didn't believe in marriage, immediately proposed to his long-term girlfriend after his own research showed that constraints increase satisfaction with choices.
Animals first sensed light 540 million years ago, triggering an evolutionary acceleration known as the Cambrian explosion within 10 million years.
It is estimated that half of all cortical activity in the human brain is involved in visual function, underscoring vision's central role in intelligence.
Cognitive neuroscience literature shows that by age 6, humans can recognize tens of thousands of different object categories — far more data than early AI systems were trained on.
Only about 3% of FDA-approved drugs have genuinely unclear mechanisms of action, making an unknown mechanism a meaningful early red flag for any compound.
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