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Thank you, I didn't know that the Navy had studied this in submarines. I found a Navy paper that's a summary of that research and it frames it as "the relations

Thank you, I didn't know that the Navy had studied this in submarines. I found a Navy paper that's a summary of that research and it frames it as "the relationship between CO2 exposure and cognition is debated" with many citations for further information, some supporting a link and some not. See PDF page 22: https://apps.dtic.mil/sti/pdfs/AD1103610.pdf https://apps.dtic.mil/sti/pdfs/AD1103610.pdf (To the other comment, the 2021 paper I linked is not "pop science".)

sarchertech 4y ago
You're welcome. I bought into the C02 makes you dumber research several years ago and bought a C02 monitor and everything before I took the time to look into the research. The context of the paper you linked is "stressors in a disabled submarine". It's not a summary of the Navy's research. It does contain a few paragraphs out of nearly 100 pages that briefly summarizes a few relevant studies, both civilian and military. Here's the relevant section: >While some studies have found that elevated CO2 may impair cognitive functions including decision making (Satish et al., 2012), attention (Schaefer, 1951), mental efficiency (Karlin, 1945), and mathematical processing (Sayers, Smith, Holland, & Keatinge, 1987), these findings are not consistently replicated (Rodeheffer, Chabal, Clarke, & Fothergill, 2018; Ryder et al., 2017; X. Zhang, Wargocki, & Lian, 2016; X. Zhang, Wargocki, Lian, & Thyregod, 2016). In fact, many studies have been unable to establish a relationship between CO2 exposure and cognitive deficits (e.g., Bloch- Salisbury, 2000; Francis et al., 2002; Sheehy, Kamon, & Kiser, 1982; Vercruyssen, Kamon, & Hancock, 2007). It lists 3 studies showing a cognitive impact impact. 2 out of the 3 show that there is a cognitive impact at extreme levels far beyond the levels that build up in a conference room, or levels that we'll be exposed to because of increased atmospheric C02. --Sayers, Smith, Holland, & Keatinge, 1987 This study showed a cognitive impact at 65,000ppm, but nothing at 45,000ppm. --Schaefer, 1951 Showed that submariners were slightly affected after prolonged exposure to 30,000ppm Then it lists 7 studies showing no impact on cognition even at very high levels. Out of 10 studies listed, 1 civilian study shows cognitive impact at 1,000ppm. The preponderance of the evidence indicates that that study is a fluke. By the way, this study is the one that kicked off the whole normal indoor levels of C02 make you dumber thing in the first place. This statement: >the relationship between CO2 exposure and cognition is debated is in the context of whether or not concentrations of up to 30,000ppm seen in a submarine disaster will impact cognition, not whether 1,000ppm in a conference room will.

sarchertech 4y ago

You're welcome. I bought into the C02 makes you dumber research several years ago and bought a C02 monitor and everything before I took the time to look into the research. The context of the paper you linked is "stressors in a disabled submarine". It's not a summary of the Navy's research. It does contain a few paragraphs out of nearly 100 pages that briefly summarizes a few relevant studies, both civilian and military. Here's the relevant section: >While some studies have found that elevated CO2 may impair cognitive functions including decision making (Satish et al., 2012), attention (Schaefer, 1951), mental efficiency (Karlin, 1945), and mathematical processing (Sayers, Smith, Holland, & Keatinge, 1987), these findings are not consistently replicated (Rodeheffer, Chabal, Clarke, & Fothergill, 2018; Ryder et al., 2017; X. Zhang, Wargocki, & Lian, 2016; X. Zhang, Wargocki, Lian, & Thyregod, 2016). In fact, many studies have been unable to establish a relationship between CO2 exposure and cognitive deficits (e.g., Bloch- Salisbury, 2000; Francis et al., 2002; Sheehy, Kamon, & Kiser, 1982; Vercruyssen, Kamon, & Hancock, 2007). It lists 3 studies showing a cognitive impact impact. 2 out of the 3 show that there is a cognitive impact at extreme levels far beyond the levels that build up in a conference room, or levels that we'll be exposed to because of increased atmospheric C02. --Sayers, Smith, Holland, & Keatinge, 1987 This study showed a cognitive impact at 65,000ppm, but nothing at 45,000ppm. --Schaefer, 1951 Showed that submariners were slightly affected after prolonged exposure to 30,000ppm Then it lists 7 studies showing no impact on cognition even at very high levels. Out of 10 studies listed, 1 civilian study shows cognitive impact at 1,000ppm. The preponderance of the evidence indicates that that study is a fluke. By the way, this study is the one that kicked off the whole normal indoor levels of C02 make you dumber thing in the first place. This statement: >the relationship between CO2 exposure and cognition is debated is in the context of whether or not concentrations of up to 30,000ppm seen in a submarine disaster will impact cognition, not whether 1,000ppm in a conference room will.