Posts Tagged ‘neuroscience’
“Person, woman, man, camera, TV”*…
In a reversal of trends, American baby boomers scored lower on a test of cognitive functioning than did members of previous generations, according to a new nationwide study.
Findings showed that average cognition scores of adults aged 50 and older increased from generation to generation, beginning with the greatest generation (born 1890-1923) and peaking among war babies (born 1942-1947).
Scores began to decline in the early baby boomers (born 1948-1953) and decreased further in the mid baby boomers (born 1954-1959).
While the prevalence of dementia has declined recently in the United States, these results suggest those trends may reverse in the coming decades, according to study author Hui Zheng, professor of sociology at The Ohio State University… “what was most surprising to me is that this decline is seen in all groups: men and women, across all races and ethnicities and across all education, income and wealth levels.”…
Baby boomers’ childhood health was as good as or better than previous generations and they came from families that had higher socioeconomic status. They also had higher levels of education and better occupations.
“The decline in cognitive functioning that we’re seeing does not come from poorer childhood conditions,” Zheng said…
Reversing of a trend that has spanned decades: “Baby boomers show concerning decline in cognitive functioning.”
On a different, but quite possibly related note, these examples from Patrick Collison‘s recent post on the effects of pollution:
• Chess players make more mistakes on polluted days: “We find that an increase of 10 µg/m³ raises the probability of making an error by 1.5 percentage points, and increases the magnitude of the errors by 9.4%. The impact of pollution is exacerbated by time pressure. When players approach the time control of games, an increase of 10 µg/m³, corresponding to about one standard deviation, increases the probability of making a meaningful error by 3.2 percentage points, and errors being 17.3% larger.” – Künn et al 2019…
• “Utilizing variations in transitory and cumulative air pollution exposures for the same individuals over time in China, we provide evidence that polluted air may impede cognitive ability as people become older, especially for less educated men. Cutting annual mean concentration of particulate matter smaller than 10 µm (PM10) in China to the Environmental Protection Agency’s standard (50 µg/m³) would move people from the median to the 63rd percentile (verbal test scores) and the 58th percentile (math test scores), respectively.” – Zhang et al 2018…
• Politicians use less complex speech on polluted days. “We apply textual analysis to convert over 100,000 verbal statements made by Canadian MPs from 2006 through 2011 into—among other metrics—speech-specific Flesch-Kincaid grade-level indices. This index measures the complexity of an MP’s speech by the number of years of education needed to accurately understand it. Conditioning on individual fixed effects and other controls, we show that elevated levels of airborne fine particulate matter reduce the complexity of MPs’s speeches. A high-pollution day, defined as daily average PM2.5 concentrations greater than 15 µg/m³, causes a 2.3% reduction in same-day speech quality. To put this into perspective, this is equivalent to the removal of 2.6 months of education.” Heyes et al 2019…
• “Exposure to CO2 and VOCs at levels found in conventional office buildings was associated with lower cognitive scores than those associated with levels of these compounds found in a Green building.” – Allen et al 2016. The effect seems to kick in at around 1,000 ppm of CO2.
The entire (chilling) piece is eminently worth reading.
And on another related note– one going not to the quality, but to the quantity of life– this characteristically-great set of infographics from Flowing Data exploring the demographic reality that underlies our (directionally-accurate) contention that “40 is the new 30 [or whatever]”: “Finding the New Age, for Your Age.”
* President Trump, recounting the memory test he took (not to establish his mental acuity, as he seemed to suggest, but rather as part of a screening for senile dementia)
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As we agonize over aging, we might recall that it was on this date in 1909, off the coast of Cape Hatteras, that telegraph operator Theodore Haubner called for help from the steamship, S. S. Arapahoe. He was momentarily confused because a new telegraph code “SOS” had recently been ratified by the Berlin Radiotelegraphic Conference to replace the old “CQD” distress call, and he wondered which signal he should send. He sent both. Haubner’s transmission was the first recorded American use of “SOS” to call for help.

Clyde steamer Araphoe. Image from the Library of Congress.
“Time flies like an arrow; fruit flies like a banana”*…
How does now unstick itself and become the past, and when does the future morph into the present? How do these states transition, one into another, so seamlessly?
How long is right now ?…
[Fascinating explorations of different explanations…]
Each theory of right now has one thing in common: It challenges the notion that the present is reliable and objective, or that it stretches out infinitely in front of us, even if we sometimes perceive it that way. This is an important reminder because the way we think about time affects the kinds of decisions we make.
We don’t just think about the past, present, or future, we think about ourselves in those places. (That’s the impetus behind something called Time Perspective Theory, which argues that there are six different ways people regard time, and it greatly influences your perspective on life.)
Studies have found that many people think about themselves in the future not as themselves, but as other people. When asked to imagine a birthday in the far off future, people are more likely to envision it from a third-person viewpoint. When we think about ourselves in 10 years, compared to right now, it activates similar parts of our brain that think about others, not ourselves.
Our instinct to place a lot of emphasis on the present, said Hal Hershfield, a psychologist at UCLA who has studied how perceptions of time relate to the choices people make. But if we could better relate to our future selves, we could be better off later on. Hershfield and his collaborators did a study that found that those who felt more similar to their future selves made more future-oriented decisions and had higher levels of well-being across a decade…
How long is right now? As long as it took you to read that question? Or shorter? Or it might not exist at all…
*
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As we remember Ram Dass, we might recall that it was on this date in 1914 that Henry Ford announced that his company would cut its workday from nine hours to eight, and double workers’ wages to $5 per day.
Cited as the beginning of the “living wage” revolution, it is often suggested that Ford made the move so that his employees could afford the product that they were making. But many historians argue that the real motivations were likelier an attempt to reduce employee turnover and to put economic pressure on competitors. In any event, that’s what happened: while Ford’s move was hugely unpopular among other automakers, they saw the increase in Ford’s productivity– and a significant increase in profit margin (from $30 million to $60 million in two years)– and (mostly) followed suit.

Assembly line at the Ford Motor Company’s Highland Park plant, ca. 1913
“Nothing is at last sacred but the integrity of your own mind”*…
Imagine that a person’s brain could be scanned in great detail and recreated in a computer simulation. The person’s mind and memories, emotions and personality would be duplicated. In effect, a new and equally valid version of that person would now exist, in a potentially immortal, digital form. This futuristic possibility is called mind uploading. The science of the brain and of consciousness increasingly suggests that mind uploading is possible – there are no laws of physics to prevent it. The technology is likely to be far in our future; it may be centuries before the details are fully worked out – and yet given how much interest and effort is already directed towards that goal, mind uploading seems inevitable. Of course we can’t be certain how it might affect our culture but as the technology of simulation and artificial neural networks shapes up, we can guess what that mind uploading future might be like.
Suppose one day you go into an uploading clinic to have your brain scanned. Let’s be generous and pretend the technology works perfectly. It’s been tested and debugged. It captures all your synapses in sufficient detail to recreate your unique mind. It gives that mind a standard-issue, virtual body that’s reasonably comfortable, with your face and voice attached, in a virtual environment like a high-quality video game. Let’s pretend all of this has come true.
Who is that second you?
Princeton neuroscientist, psychologist, and philosopher Michael Graziano explores: “What happens if your mind lives forever on the internet?”
* Self-Reliance
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As we ponder presence, we might spare a thought for William “Willy” A. Higinbotham; he died on this date in 1994. A physicist who was a member of the team that developed the first atomic bomb, he later became a leader in the nuclear non-proliferation movement.
But Higinbotham may be better remembered as the creator of Tennis for Two— the first interactive analog computer game, one of the first electronic games to use a graphical display, and the first to be created as entertainment (as opposed to as a demonstration of a computer’s capabilities). He built it for the 1958 visitor day at Brookhaven National Laboratory.
It used a small analogue computer with ten direct-connected operational amplifiers and output a side view of the curved flight of the tennis ball on an oscilloscope only five inches in diameter. Each player had a control knob and a button.

The 1958 Tennis for Two exhibit
“We must believe in free will — we have no choice”*…
In March, a group of neuroscientists and philosophers announced that they’ve received $7 million to study the nature of free will and whether humans have it. Uri Maoz, a computational neuroscientist at Chapman University, is leading the project. “As a scientist, I don’t know what it entails to have free will,” he said in an interview with Science. That’s a philosophical puzzle. But once Maoz’s philosopher colleagues agree on a definition, he can get to work to see if it occurs in humans. “This is an empirical question. It may be that I don’t have the technology to measure it, but that is at least an empirical question that I could get at.”…
Or can he? An update on neuroscientific efforts to answer a philosophical question– and an appreciation of your correspondent’s favorite television series, The Good Place: “Can Neuroscience Understand Free Will?”
* Isaac Bashevis Singer
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As we muse on motivation, we might recall that it was on this date in 1910 that George Herriman‘s signature characters, Krazy Kat and Ignatz Mouse, made their first appearance in the bottom of the frames in Herriman’s The Dingbat Family daily comic strip. They got their own strip three years later, scored a Sunday panel in 1916– and delighted readers with the surreal philosophical questions they raised until 1944.