4 ms·
> In Los Angeles, after $700 air purifiers were installed in schools, student performance improved almost as much as it would if class sizes were reduced by a t
by thriftwy 5y ago
> In Los Angeles, after $700 air purifiers were installed in schools, student performance improved almost as much as it would if class sizes were reduced by a third.
This sounds like an impossible casuation. Either the class size reduction effect is tiny, or the claimed benefit of purifiers is not there.
- y4mi 5y agoI disagree. It depends entirely on what the purifiers did and how the air quality was before/after. The ability to concentrate really drops a lot once the CO2 content goes above 1k for example. I'd expect at least that kind of change if these managed to get the CO2 from 1.5k+ down to 500 ppa or other similar metrics.
- lostmsu 5y agoCan you link a study for CO2? I read previously that it does affect cognition, but some notion of the size of the impact would be useful.
- y4mi 5y agoThere are a lot around. One random example https://www.researchgate.net/publication/265948386_Impact_of_CO_2_on_human_decision_making_and_productivity https://www.researchgate.net/publication/265948386_Impact_of...
- vlunkr 5y agoAgreed. Maybe along with air purifiers they spent money on other new resources as well.