It was mid-February and Maria Konnikova — a psychologist, writer and champion poker player — was on a multicity trip. From her hotel room in New Orleans, she called her sister, a doctor, to discuss the emerging COVID-19 pandemic. Konnikova saw there were early cases in Los Angeles, where she was headed for a poker tournament.

The odds of Konnikova getting infected or spreading the virus by participating in a large indoor event were unknown. But as a poker player she had a lot of experience thinking through the probable risks associated with different decisions. So she played it conservatively. She cut short her trip and went home to quarantine in New York.

Konnikova’s psychology expertise tells her that most people have a hard time thinking through the uncertainty and probabilities posed by the pandemic. People tend to learn through experience, and we’ve never lived through anything like COVID-19. Every day, people face unpleasant and uncertain risks associated with their behavior, and that ambiguity goes against how we tend to think. “The brain likes certainty,” she said. “The brain likes black and white. It wants clear answers and wants clear cause and effect. It doesn’t like living in a world of ambiguities and gray zones.”

Many months into the pandemic, even as the nation faces its highest average daily case counts to date, people still don’t agree on how to live in the era of COVID-19. We know how to protect ourselves — washing our hands, wearing masks and staying socially distant — but many people still take unnecessary risks, even at the highest levels of government.


In late September, the White House hosted an indoor party celebrating the nomination of Judge Amy Coney Barrett to the Supreme Court. It became a possible superspreader event because attendees did not wear masks and ignored social distancing recommendations. Former New Jersey Gov. Chris Christie didn’t wear a mask at the event. He also went without one when he helped President Donald Trump prepare for his first debate. Christie later spent a week in intensive care with COVID-19 and then wrote an opinion article in The Wall Street Journal titled “I Should Have Worn a Mask.” “I let my guard down,” he wrote.

The U.S. Centers for Disease Control and Prevention called on Americans to wear masks in July. So why is it so hard for people to mask up and practice other established behaviors to prevent the spread of COVID-19? The problem, experts who study the way we think say, is that the unprecedented nature of the pandemic makes us vulnerable to subtle biases that undermine how we process information and assess risk. Our brains can play tricks on us. That causes some people to underestimate their risk, the experts said.

When Las Vegas reopened, crowds showed up without masks. An estimated 365,000 people attended the annual Sturgis Motorcycle Rally in South Dakota. Many didn’t wear helmets or masks. The festivities included a non-socially distanced concert by Smashmouth. And even though masks were distributed and required at a recent Trump campaign rally in Erie, Pennsylvania, some attendees did not wear them, and the campaign packed people into crowded buses.

It may not always seem like it, but people are rational and weigh the costs and benefits when they make decisions, said Eve Wittenberg, a decision scientist at the Center for Health Decision Science at the Harvard T.H. Chan School of Public Health. “People are not stupid here,” she said. But they have no experience thinking through a pandemic and are also getting mixed and conflicted messages from leaders, she said. That creates uncertainty and can lead people to rely on patterns of risk perception that may not be accurate.

The Power of Social Norms and Personal Experience

People may be more likely to participate in riskier activities because they tend to behave according to the norms that surround them, said Lisa Robinson, a senior research scientist at the Center for Health Decision Science. If we’re surrounded by people who behave a certain way, she said, we are more likely to behave the same way.

At this point the facts about COVID-19 are well established. It’s extremely contagious and transmitted via droplets that come from an infected person’s mouth or nose. This can happen during speech, coughing, sneezing or breathing — whether a person is experiencing symptoms or not. Older and sicker people are at higher risk of serious illness or death. But young, healthy people can still become infected and sick, and they can also put others at risk by spreading the virus.

A well-known historical example of people being directed by social norms is smoking, Robinson said. For decades the societal norm said smoking was cool, even after it was known to kill people. That contributed to a lot of people smoking, willing to take the risk. Then the norm flipped and smoking became uncool, and fewer people smoked. “We take a lot of cues from our environment,” Robinson said. “If I see a lot of people wearing a mask, I wear a mask.”

Betsy Paluck, a professor of psychology and public policy at Princeton University and MacArthur “Genius” Fellow, studies how these social norms are formed and how they shift over time.

“There’s a lot of competing information out there,” Paluck said. “Your individual decisions are very real to you, of course, but they need to be validated by other people in your neighborhood, your organization.”

Paluck said everyone is influenced by social norms, including her. She has a newborn and elderly parents, so she’s been cautious during the pandemic. But it’s getting harder to be careful as people broaden their social lives.

She talked recently to a friend who is holding her kids out of school, opting for all virtual instruction. The friend’s decision felt like a huge relief because it affirmed Paluck’s own feelings. It showed her how much we all rely on our shared reality. “Holding the line on your own is just not tenable,” she said.

Personal experience also has an outsized role in decision-making. People who were in the hot zones of New York City and New Jersey during the initial spread of COVID-19 witnessed the effects of the virus. They may have become infected themselves or known others who became sick or even died. They might have known health care workers who cared for the sick, potentially exposing themselves in the process. Meanwhile, people in parts of the country that have not been hit hard by the virus might not have had that experience and therefore fail to appreciate the risk.

Poker players, along with folks like meteorologists, horse race handicappers and lawyers who work on a contingency basis are routinely rewarded or punished based on the odds. This gives them a rare visceral, experiential understanding of percentages and lets them short-circuit a cognitive effect called the “description-experience gap,” which leads people to underestimate risk based on their own personal experiences.

Even Nobel Prize-winning economists are susceptible to it. The pandemic is beyond the limits of human intuition, said the psychologist and economist Daniel Kahneman on Konnikova’s podcast.

Wittenberg pointed to the work of Kahneman and Amos Tversky, who coined the term “availability” to describe how we base our thinking on what we’ve seen or experienced. We see it show up when a person assesses his or her risk of a heart attack by recalling instances among acquaintances, the two researchers wrote in their 1974 paper, “Judgment Under Uncertainty.”

The researchers also noted how some instances might come to mind more easily than others and thus get more heavily weighted in decision-making. Other instances might be more salient or may have happened more frequently, so they come to mind faster. Relying on “availability” to make decisions introduces biases, according to Kahneman and Tversky. “It is a common experience that the subjective probability of traffic accidents rises temporarily when one sees a car overturned by the side of the road,” the researchers wrote.

The Need for Leaders and Institutions to Guide Us

The confusion surrounding COVID-19 was magnified by a lack of testing in the early days of the pandemic and then delays in test results, Wittenberg said. That meant people didn’t have clear data to anchor their risk assessment.

The confusion called for leaders to guide the public with clear public health messages, but instead they have exacerbated the problems. It was well known relatively early in the pandemic that wearing a mask could help prevent the spread of the virus, but it took until July before Trump wore one in public for the first time. Some governors have downplayed the risk posed by the virus, others have emphasized it. That’s left the public “grappling with mixed and conflicted messages,” Wittenberg said.

Baruch Fischhoff, a psychologist who studies risk and decision-making at Carnegie Mellon University, said people are good at perceiving risk if they are getting information from a trustworthy source. But the risks associated with the coronavirus, which is invisible, are not intuitive, he said. It’s hard for people to project the exponential spread of the virus, he said. Our minds don’t easily extrapolate it, so we need leaders to help protect us from ourselves, he said.

The situation could be compared to how the government protects people at train crossings, Fischhoff said. Drivers are good at estimating the speed of other cars. But research from accidents at train crossings has shown that drivers are not good at estimating the speed of oncoming trains, which are much bigger. “Our brains are calibrated to treat a train like a car,” he said, “but it’s going faster than it looks.”

To stay safe from an oncoming train, drivers either need to go against their intuition, have someone warn them in a way they will remember or have something block the crossing when a train approaches. “Somebody needs to protect you,” he said.

Good public health communication requires testing messages to make sure they are interpreted correctly by a wide range of people, Fischhoff said. “Our official communicators have dropped the ball, and they have been undermined by people who don’t have the public’s interest at heart,” he said.

Paluck, the social psychologist, said certain leaders and influencers stick out like bright colors. They’re charismatic and we look to them when we check our own behavior. “What they say and do becomes the anchor we use,” she said.

People also put faith in trustworthy institutions, she said, even when they may not agree with what the institution is saying. She and a colleague found something suprising when they studied the effect of the Supreme Court legalizing same-sex marriage. A greater number of people supported same-sex marriage because of the Supreme Court’s decision, even if they had not changed their personal views. “They thought that there was a bigger consensus in the United States that same-sex marriage was a good thing,” Paluck said. “So that’s the power of an institution.”

Optimism Bias and Why Institutions Failed to Act

Optimism bias is a pattern of thinking that causes our brains to see future outcomes as rosier than they really are. It transcends gender, culture and age. It turns out to be incredibly helpful in most situations. There’s only one subset of the population that doesn’t experience optimism bias, Konnikova said — people suffering from depression.

“This is actually something that’s very psychologically protective,” she said. “It ends up that seeing the world as it is makes you clinically depressed.”

When it comes to institutional behavior, however, optimism bias can lead to poor planning and risky decision-making.

Dr. Eric Toner is a senior scholar at the Johns Hopkins Center for Health Security and says that the pandemic has taught him about the power of denial. The global public health community learned in mid-January about the extent of community transmission of the novel coronavirus in Wuhan, China, Toner said. The most obvious sign of concern, he said, came when China took the dramatic step of locking down Wuhan, one of its largest cities. Something really bad is happening, he thought to himself.

And yet, public health officials in the United States were slow to sound an alarm. “People have trouble recognizing when they’re facing a catastrophic threat and on the other hand they exaggerate minor threats,” Toner said. “We needed messaging from the top of the government that says this is a serious threat.”

“Until you hear the message from somebody who is in a position of authority, I think there is a tendency to really want to not believe it. People don’t want to believe really bad news.”

Toner said the Center for Health Security heard over and over again that hospital CEOs would not be convinced of the dire threat posed by the pandemic until the federal government decided to say something. But by then much time had been lost.

When public health officials did sound an early alarm, their voices were squelched. Dr. Nancy Messonnier, one of the senior leaders at the CDC, warned on Feb. 25 that there would be community spread of the virus, and that protective measures might include school closures and working from home. As ProPublica previously reported, her comments caused the stock market to drop, which infuriated Trump. Vice President Mike Pence was installed as communicator-in-chief, and the CDC officials were sidelined. “When it mattered most, they shut us up,” a senior CDC official told ProPublica.

Toner’s group is in charge of designing pandemic preparedness exercises. Some of them are eerily similar to our current situation. He said he’s often asked how it’s possible that we did all these exercises and still had such a bad response to the COVID-19 pandemic. His answer: The exercises advanced the field, but they had their limits. “They didn’t inoculate us against really bad decision-making,” he said.

This article first appeared on ProPublica. You can read it here.

  • New Russian research suggests that the human lifespan could be up to 156 years
    Photo credit: CanvaResearchers found what's preventing us from living longer.
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    New Russian research suggests that the human lifespan could be up to 156 years

    Humans can live much longer if certain barriers are addressed.

    According to the Guinness Book of World Records, the oldest person lived to the ripe age of 122 years old. Such a lifespan is an incredible feat, but what if the average person could beat that record by 34 years? Recent research done in Russia has led scientists to believe that the average human lifespan could be up to 156 years.

    The researchers at Skoltech Biomed Technologies Center developed a mathematical model that allowed them to “switch on” a variety of aging mechanisms. This allowed them to calculate a human’s lifespan where mortality risk never increased with age. After experimenting with different scenarios and conditions, they found the biggest barriers to longevity were caused by non-renewable tissues and somatic mutations.

    What are these barriers against longer life?

    Somatic mutations are DNA changes within a cell. They accumulate over time during a human’s life and cannot be reversed with any existing therapy. These DNA errors that pile up in our cells contribute to the aging process.

    Many human organs like the liver and skin continually replace cells and regrow damaged portions of themselves. However, there are two organs that can’t do this: the brain and the heart. Brain tissue (neurons) and heart tissue (cardiomyocytes) cannot regenerate. This proves to be the most prominent biological limit that shortens our lifespans. This explains why issues like dementia and heart disease are prominent causes of death and morbidity later in life. Since those organs’ tissues don’t replace damaged cells, they’re prone to irrevocably decline over time.

    “The key finding of the study is the discovery of substantial differences between tissue types. Neurons and cardiomyocytes, which lack the ability to divide, turned out to be the main limiting factors: when all other causes of aging are eliminated, somatic mutations alone reduce the theoretical median lifespan from 1,759 years (for a hypothetical non-aging human organism) to 156 years,” said Evgeny Efimov, a research intern at the Skoltech Biomed Technologies Center, researcher at AIRI, and one of the key authors of the study.

    This suggests that somatic mutations and DNA damage is what ultimately prevents humans from living indefinitely, even if our brains and hearts regenerated cells like other organs.

    So what’s next?

    Now knowing these biological limitations, the researchers hope to study other areas of aging impacting the human lifespan that could plausibly be reversed. This includes mitochondrial dysfunction, telomere shortening, epigenetic drift, and loss of proteostasis. 

    The hope is to have a clearer priority list of issues for future therapies to tackle. This is not just to possibly extend life, but to improve lives in general. By developing a fully comprehensive theory of aging, Skoltech hopes to pinpoint which aspects of aging are within our scope to address. After all, thoroughly studying each puzzle piece that makes up human life gives us a better understanding of the whole.

    Of course, other impactful factors in a person’s lifespan can be addressed today. As most know, things like diet, sleep, and exercise are among them. A person’s living environment can also negatively impact their lifespan if it doesn’t have clean air, access to clean water, and so on.

    For now, the best method for living long is to follow instructions from your physician. Whether you make it to 156 years or not, living well is best for whatever time you’re given.

  • Screen time guidelines for kids and adolescents have shifted as research paints a more nuanced picture
    Photo credit: PeopleImages/iStock via Getty ImagesWhat kids are doing on tablets seems to matter more than how long they use them.

    Concerns surrounding young people’s screen time are widespread.

    Australia became the first country to ban social media for users under 16 in December 2025, and DenmarkFrance and the U.K. have since announced similar restrictions to begin this year.

    In the U.S., as of mid-2026, more than 30 states have passed laws banning or restricting cellphones in K–12 classrooms; in 2023, the U.S. surgeon general issued a formal advisory on social media and children’s and adolescents’ mental health; and bestselling books tell parents that smartphones are “rewiring” their children’s brains.

    These concerns and policies are part of a quickly changing national and international conversation around how young people spend time on screens and its relationship to their overall health and development. My reading of the mounting research on this issue across disciplines is that the popular narrative blaming screens and smartphones for an adolescent mental health crisis runs well ahead of the current evidence.

    I study adolescent digital media use and its influence on social, emotional and academic outcomes. A growing body of research suggests that one-size-fits-all solutions are not the answer and that managing appropriate use of digital media needs to take into account a child’s developmental milestones, how parents and adults around them use media, and the ways kids use it to connect and learn with friends and family.

    Screen time: From monolith to multifaceted

    Wide adoption of digital media and the internet broadened the range of experiences young people could have online. At the same time, the digital age introduced newfound uncertainties. As with the advent of radio, comic books and arcades, adults worried about how children might interact with or be affected by internet use.

    In response, the American Academy of Pediatrics first recommended in 1999 that parents and caregivers keep children under 2 away from screens. In the decades since, professional guidance largely treated children’s media use as a behavior to be mitigated.

    Policies introduced by the academy in 2013 and 2016 continued to advise that school-age kids and adolescents – those ages 5 to 18 – be restricted to no more than two hours of “entertainment” screen time a day. The goal was to curb risks associated with heavy media use, among them disrupted sleep, online safety, cyberbullying and physical inactivity.

    Originally created for young people’s engagement with stationary media that tend to be confined to one room or context – for example, watching television – these hourly limits became outdated with the integration of smartphones and other digital devices into everyday life. Compared with watching television, online media was far more difficult to track and define, and more nuanced in its use.

    Developmentally beneficial activities such as educationsocializing and leisure have come to rely on the internet to extend and maintain face-to-face connections. Remote schooling and social distancing during the COVID-19 pandemic only accelerated this digitization of daily life.

    In my view, adopting strict time limits and restrictions could pose risks to children’s well-beingautonomy and development, for example, by harming adolescent self-esteem.

    The latest guidelines

    In January 2026, the American Academy of Pediatrics retired its decade-old framework that had largely organized its advice around hourly screen limits. The new policy statement on children, adolescents and digital media diverges from this blanket approach. Instead, it suggests parents consider the larger picture in which this media use exists rather than lumping all screen use together.

    Similar to the World Health Organization’s 2019 guidance for children under 5, the American Academy of Pediatrics still advises that parents avoid screen media for children younger than 18 months. This recommendation is largely because extended use by children by themselves can be problematic for many young children, crowding out important developmental milestones.

    Both the World Health Organization and the American Academy of Pediatrics also recommend that when children under 24 months use screens, they should be limited to content and devices that encourage children and caregivers to interact. For ages 2 to 5, screen time – including TV and interactive apps on devices – may be extended to more solo use, provided it’s high-quality digital media designed around learning goals in mathematics and reading. But recreational use should be limited to roughly an hour per day.

    For school-age children and teens, the newest guidance has begun to step away from fixed screen time limits and asks families to weigh online activity in the context of everyday life.

    Doing so recognizes that a child’s digital experiences are shaped by diverse factors rather than the hours spent online. Current guidelines call on caregivers to distinguish among types of media, from television and social media to video games and interacting with artificial intelligence chatbots. They also call for taking into account a child’s individual characteristics, such as their interests and personality, family members’ own use of screens, and the type of content children are spending time on.

    Rethinking screen time

    Moving beyond strict screen time limits includes questioning the kind of digital activities kids and adolescents participate in. Do the activities encourage time spent interacting with others online, which can help young people develop important skills and competencies?

    Scrolling an algorithm-based, auto-playing video feed likely does not equate to the same opportunities as video-chatting with friends, creating digital art or working with teammates in a multiplayer game. Research suggests these different uses relate to development in different ways and can help kids develop varying skill sets pertaining to everyday life and schooling.

    Indeed, a large review of current research found that young people who take part in a range of digital activities, such as browsing the web, online gaming or interacting on social media, show positive associations with social connection, identity exploration, civic participation and learning.

    A woman and two small children look at tablet screen
    Parental involvement in young children’s screen time has developmental benefits. Cultura Creative/Tetra images via Getty Images

    Using these guidelines at home

    The current evidence suggests parents and caregivers are best positioned to be digital instructors. Cutting children off altogether can carry its own risks for social and emotional development. Caregiver mediation of children’s screen time can produce widely different outcomes and effects, depending on whether the guidance is supportive or controlling.

    Considering your own digital media use is the first step: Are family members engaging in problematic or heavy media use that children in the household might emulate? What applications and uses are most common in the family, and what positive or negative effects might they have, depending on the child’s age? How could these digital activities be safely integrated with other everyday experiences to increase their benefit for children? Conversely, what online time might be better spent on face-to-face experiences?

    The American Academy of Pediatrics’ Family Media Plan tool turns these ideas into concrete questions. For example, it recommends working out what each child needs from digital technology, what activities screens might be crowding out, and where their family or household can build in screen-free time. The recommendation is to talk with each child about why they are drawn to particular apps or online activities, what they encounter while browsing, and what might be lost when kids bring phones to gatherings such as mealtimes.

    The debate over young people’s screen time is not going away. But the most up-to-date guidelines, and the growing body of research behind them, make a strong case for a more holistic approach. The guidelines treat digital media as a complex, diverse and evolving environment that children need to learn to navigate in the digital age. The risks and rewards depend, as with any developmental setting, on the child, the content and what online time might be crowding out.

    This article originally appeared on The Conversation. You can read it here.

  • ER doctor and mom sets the record straight for parents of kids with e-bikes and e-scooters
    Photo credit: CanvaA boy rides an e-scooter, left, while a girl is examined in an emergency room.

    An emergency room doctor and fellow mom has been noticing a troubling trend: Many parents are giving their kids something more powerful than bicycles to get around the neighborhood. As a result, she’s seeing more children come into the ER with injuries sustained in e-bike and e-scooter crashes. She recently went online with a plea to parents and young riders.

    Dr. Meghan Elizabeth Beach Martin, known online as Dr. Beachgem, posted a video in her scrubs discussing her concerns after seeing so many children come into the hospital with e-bike injuries during the summer months. She’s worried that too many kids and parents don’t understand the proper safety precautions. As a mother herself, she even questions why children are allowed to ride these devices at all.

    In the video, the doctor explains that some e-bikes can reach speeds of up to 28 mph. She says that if an e-bike goes any faster than that, it’s technically classified as a motorcycle. At those speeds, she regularly sees children with traumatic injuries and broken bones after hitting bumps, cracks in the road, or other vehicles. Many of them aren’t wearing helmets or protective pads, and some are even riding barefoot, making their injuries even more severe. Martin’s video has gained traction on Reddit and elsewhere online.

    E-bikes and e-scooters, examined

    Martin isn’t the only professional seeing a growing problem. The American College of Surgeons reports that there are more than 20,000 e-bike-related injuries each year. Meanwhile, a University of California, San Francisco study found that e-bike injuries doubled annually from 2017 to 2022. The same study found that e-scooter injuries increased by 45% each year during the same period.

    Before riding an e-bike, it’s important to follow proper safety procedures. Make sure you and your child understand your area’s laws regarding e-bikes, including any minimum age requirements. Always wear a helmet and other protective gear when riding. Consider choosing an e-bike with safety features such as motor-interrupt brake levers and disc brakes. These are just a few of the many safety tips experts recommend.

    The U.S. Consumer Product Safety Commission has similar safety tips for e-scooter riders. Wearing a helmet is one of its top recommendations, along with taking other basic precautions. The agency also recommends checking the brakes before riding and slowing down for bumps, cracks, and other road hazards.

    The vast majority of e-scooters and e-bikes are designed for only one rider, so avoid doubling up. Although laws vary by state and locality, wearing more protective gear is always the safer choice. Riders should also review local e-bike and e-scooter laws to make sure they are operating the vehicles safely and legally.

    A little research goes a long way toward making sure you and your children can ride safely. It’s also important for parents to understand that many e-bikes and e-scooters can travel at speeds that make them very different from a traditional bicycle. The last thing you want is for you or your child to become another emergency room statistic.

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