Lumosity claims more than 100 million users across nearly 200 countries, giving researchers an unusually large and geographically diverse dataset for studying cognition.
Where this was said
At 23:10 · chapter starts 21:40
Research by economists James Archsmith, Anthony Hayes, and Sudeh Saberian showed that MLB umpires made more wrong calls on high-pollution days — the first strong evidence that air pollution impairs professional adult cognition. But Linos saw its limits: one population, one task. She and her co-author Edson Severnini gained access to Lumosity's Human Cognition Project, pulling data from over 100,000 US users playing games measuring verbal ability, attention, flexibility, working memory, math, processing speed, and problem-solving across more than 4 million gameplay observations over 3 years. [1] — Andrea Linos "Researchers analyzing baseball umpires found they made more wrong calls on high-pollution days. It was the first strong evidence that air p…" 21:41 To handle the fact that pollution isn't measured 'attached to bodies,' the team used wind direction as an instrument: when wind carries pollution from other locations into an area, all residents receive roughly the same dose, creating a natural experiment. The stage is set for a headline result that would shake even the experts.
Researchers analyzing baseball umpires found they made more wrong calls on high-pollution days. It was the first strong evidence that air pollution impairs professional adult performance — not just students taking tests.
Because pollution monitors aren't strapped to individuals' bodies, measuring exact exposure is hard. Linos and Severnini solved this by using wind direction: when wind pushes pollution from other locations into an area, every resident gets roughly the same dose — making it a natural experiment in a population.
Economists Linos and Severnini measured pollution effects on cognition using more than 4 million Lumosity gameplay observations from over 100,000 users across the US over 3 years.
Even when air pollution stays below EPA and WHO guidelines, cognition is measurably impaired across seven cognitive domains — including memory, attention, flexibility, and problem-solving. The biggest effects hit adults under 50.
Sam's initial MVP was coded in approximately one week using ChatGPT voice mode and copy-pasting code, with no prior technical experience.
Sam argues Discord is 10x better than email for building relationships with younger users who rarely check their inbox.
Sam's monthly operating costs include Cursor ($200), AI image generation ($100), AI video generation ($200), hosting ($100), email marketing ($80), and AI compute ($300–$500).
Sam recommends copying days of Discord chat history into ChatGPT and prompting it to list recurring pain points as a fast, free market research technique.
Bhanu and his team built approximately 50 free tools to attract search traffic, each linked back to SiteGPT.
With AI coding tools like Cursor, Bhanu can now create a new free marketing tool in less than 5 minutes by referencing existing tools.
Bhanu filters Ahrefs keyword results to show only those with a keyword difficulty below 10, making them realistic ranking targets for any decent website.
Bhanu sets a minimum search volume of 1,000 monthly searches when selecting keywords to target with free tools.
PropGPT averaged 20 downloads per day right after launching on the App Store through influencer marketing.
We use essential and analytics cookies to run Vuci. To understand how the site is used: Privacy Policy.
Install Vuci on your phone
Add it to your home screen for a faster, app-like experience.
Install Vuci on your phone
Tap the Share button, then “Add to Home Screen”.
A new version is available
Reload to get the latest Vuci.