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Five Million Airbnb Reviews Illuminate Guests’ Crime and Safety Concerns
Concerns about crime and safety have a dramatic impact on the behavior of Airbnb customers, according to new research co-authored by Liad Wagman, Ph.D., Dean of the RPI Lally School of Management. In an analysis of nearly 5 million reviews left by Airbnb guests, Wagman and his colleagues found that a short-term rental property’s occupancy rate and rental price dropped by significant amounts after a guest left a review mentioning safety concerns at or around the property: occupancy rates fell by anywhere from 1.5 to 2.4 percent, while average nightly prices dropped by roughly 1.5 percent. These negative safety reviews influenced the behavior not only of potential future customers, but also of the people who wrote them. A customer who mentioned concerns about crime and safety in the neighborhood around a property, for instance, became 60 percent less likely to ever use Airbnb again. “To see the effect of these dynamics play out in action is always fascinating to me," Wagman said. “Given that humans have different preferences, and that information transmittal is imperfect, it’s unsurprising that the effect of self-experience is larger than that of reading a critical review that resulted from it.” Worries about safety within a property — say, a broken step or a slippery tub — also reduced customers’ willingness to return to the platform, but by a more modest amount. The study also found that when people with neighborhood safety concerns did return to the platform, they tended to book properties in areas with lower rates of crime. The study, co-authored by Aron Culotta of Tulane, Ginger Zhe Jin of the University of Maryland, and Yidan Sun of Binghamton University, was published in the journal Marketing Science. Overall, the researchers found that safety-oriented reviews were rare: only about 0.5 percent of customer reviews mentioned safety concerns. But those reviews tend to be more negative in sentiment than the typical customer review, giving them an outsize impact on the behavior of subsequent would-be customers. The findings illustrate a delicate balancing act digital platforms have to perform, particularly those that rely heavily on user reviews: while highlighting negative experiences can help consumers make more informed choices, too much emphasis can drive customers away completely. The team ran several simulations calibrated by their empirical analysis to test how these dynamics play out in the market. They found that if a platform suppressed negative safety reviews completely, customers might assume that safety information was being hidden, and become more wary of using the platform in general. Conversely, while more transparency around safety issues could lead to fewer bookings of impacted properties in the short term, in the long run such a policy could boost user trust and draw more people to the platform, offsetting the short-term losses. “Platforms with the competitive space to focus on long-term objectives may benefit from a higher level of transparency, which can be facilitated by making information that is relevant to their buyers’ decision-making more readily available,” Wagman said. “Doing so facilitates trust and helps incentivize sellers to work to improve the quality of their offerings, as well as help shape sellers' decisions to enter a market (e.g., offer their listings) in the first place.”
Taking the Reins of Holiday Stress
Ho-ho-ho and a bottle of Tums? From feeding a crowd to juggling travel and schedules and managing finances during a challenging economic time, the holidays can feel like a pressure cooker. But University of Rochester psychologist Jeremy Jamieson, one of the country’s leading researchers on stress, says the pressures of the season of giving (and giving and giving and giving some more) can be mitigated by mentally reframing the stress we feel. In other words, what matters is how we interpret our stress. Jamieson’s Social Stress Lab studies a technique called "stress reappraisal": the practice of reframing stress responses as helpful rather than harmful. According to researchers, people can learn to treat their signs of stress — the racing heart, the sweaty palms, the mental sense of urgency — as tools that prepare them to meet a challenge rather than a sign that they’re falling apart. “Stress reappraisal isn’t about calming down or shutting stress off,” Jamieson says. “It’s about changing the meaning of your stress response. If you view the demands as something you can handle, your body shifts into a challenge state, which is a more adaptive, productive kind of stress.” The research behind this approach has grown considerably. In one of Jamieson’s studies, published in Journal of Experimental Psychology: General, the Social Stress Lab trained community college students to reinterpret stress as a resource. The results were striking: students experienced less anxiety, performed better on exams, procrastinated less, were more likely to stay enrolled, and approached academic challenges with healthier physiological responses. Newer findings from the lab also suggest that stress reframing can support people facing workplace pressures, caregiving responsibilities, and major life transitions. In short, stress isn’t the enemy of our well-being during the holidays. The real culprit is believing stress is dangerous. Jamieson is available for interviews and can explain how people can use stress reappraisal strategies to navigate holiday pressures — and other high-demand moments — with more confidence, better health, and better outcomes. Click on his profile to connect with him.
New AI model predicts harmful videos before they go viral
Certain short-form videos on major social media platforms can trigger suicidal thoughts among vulnerable viewers, according to new research led by the University of Delaware's Jiaheng Xie. His team developed an AI model that can predict and flag these videos. In the study, published Nov. 17 in Information Systems Research, UD professor Jiaheng Xie and his co-authors showed how AI can assist with safety by predicting high-risk videos before they go viral by looking through both the content and what people write in the comments. • Distinguish what creators choose to post from what viewers think or feel after watching. • Separate known medical risk factors from emerging social media trends, such as viral heartbreak clips or challenges that may influence teens. • This system is especially novel because it predicts the high-risk videos before they reach large audiences. Xie is available for a Zoom interview to share how the model was developed and how it could potentially change the way platforms such as TikTok moderate.
New findings from a recent survey conducted by CAA Manitoba (CAA MB) highlight a concerning trend: substance use, particularly cannabis, is on the rise both recreationally and behind the wheel. “Cannabis is more accessible than ever, and that means more Manitobans are not only choosing to drive after consuming it but are also getting behind the wheel soon after and expressing increased confidence in their ability to do so,” says Ewald Friesen, manager, government & community relations for CAA Manitoba. The data shows that 24 per cent of drivers admitted to consuming cannabis before driving, which is up six per cent from last year, while ten per cent of Manitobans reported driving after consuming cannabis in the past few months, a three per cent increase from 2024. Among cannabis-impaired drivers, most (63 per cent) say they drove within three hours of consumption, which is up 10 per cent from last year. Over a third of cannabis-impaired drivers acknowledged feeling high while driving. In addition to the survey conducted by CAA MB, a recent study with funding support from CAA, conducted by the University of Saskatchewan, examined 50 drivers aged 19 to 30 to assess how consuming edible cannabis influences collision risk. This age group of young drivers, identified as having the highest crash rates and a greater tendency toward risky driving behaviour, offers new insights into the impact of cannabis on driving. Drivers often have a false sense of confidence when driving high. This study examined how consuming edible cannabis affects collision risk. Findings indicate that critical driving skills, including reaction time, lane discipline, and speed control, were impaired even shortly after consumption. Contrary to popular belief that cannabis edibles take hours to take effect, this study shows that impairment is evident 90 minutes after consumption. When asked if they felt safe to drive after consuming edibles, only four per cent felt safe getting behind the wheel 90 minutes after eating an edible cannabis product. What is interesting about this is that in a controlled environment, young drivers feel unsafe driving under the influence of cannabis. However, the study conducted by CAA MB shows that drivers often have a false sense of confidence when they have driven high in the past. “This study marks an important first step in understanding how cannabis edibles impact driving performance,” adds says Friesen. “Too often, decisions about whether someone is fit to drive are made in the moment, relying on judgment rather than evidence. Cannabis impairment studies like this are essential. Each one brings new learnings that help us refine our approach and ensure that safety is never left to chance.” According to CAA Manitoba’s data, more drivers have reported feeling confident in their driving ability (77 per cent), which is up ten per cent from 2024. More drivers this year (33 per cent) also say that they are unsure about how much cannabis is needed for effects to kick in, up six per cent from 2024. Alarmingly enough, more than half of Manitobans are unaware that the penalties associated with driving under the influence of alcohol, drugs, or a combination of substances are the same. “Drivers may face enhanced roadside sanctions, including an administrative penalty of $700, vehicle impoundment, mandatory Ignition Interlock participation for one year, an impaired driver assessment and movement of 10 levels down the Driver Safety Rating scale,” says Friesen. “Depending on the severity of convictions, impaired drivers may be charged further under the Criminal Code of Canada.” This holiday season, CAA Manitoba is asking that those who do consume cannabis, alcohol or other drugs to plan ahead by making alternate arrangements, such as a designated driver or using a rideshare service, to get home safely. Methodology CAA MB The online survey was conducted by DIG Insights from June 27 to July 14, 2025, with 514 Manitoba drivers aged 19 and older. Based on the sample size of n=514 and with a confidence level of 95 per cent, the margin of error for this research is +/- 3%.) Methodology of University of Saskatchewan study The study collected extensive data from 50 young adult drivers (aged 19–30), resulting in 250 assessments across multiple realistic driving scenarios using a simulator after consuming a 10mg THC edible.
When Markets Wobble (Part 2): How Canadians Can Use Home Equity as Their Ultimate Cash Wedge:
In an earlier post I laid out one of the foundational blocks of your retirement defense system: the "Cash Wedge" - that boring-but-brilliant cushion of cash, GICs, and T-Bills that protects you from selling investments when markets wobble. The Cash Wedge is the mild-mannered superhero of your retirement plan. It buys you time, flexibility, and peace of mind, as it gives you permission to wait for markets to recover— Now if you missed Part 1, go back and give it a quick read here. For Canadian homeowners — especially those whose wealth is mostly in their property — there are additional options that allow you to use your equity as a second buffer, dramatically strengthening your financial resilience. How Home Equity Strategies Can Help You Create a Backup Wedge for Retirement Here's the risk that catches thousands off guard: sequence-of-returns risk combined with home equity concentration. Translation: While you own your home, you encounter problematic market conditions early in retirement while withdrawing, and your options narrow quickly. Author Wade Pfau's research demonstrates that home equity can serve as a "buffer asset," shielding investments during economic downturns. Instead of selling investments when markets are down, it might be smarter to temporarily access a pre-arranged HELOC or reverse mortgage. Once markets recover, you can repay the credit line. This isn't debt panic — it's strategic damage control. Warren Buffett's Wisdom Applied to Canadian Retirement As an investor, Warren Buffett is the epitome of control and discipline. His now famous quote rings true in these times. “The stock market is a device for transferring money from the impatient to the patient.” Translation for retirees: Keep dry powder. Own quality investments. Don't chase fads. And stop looking for the bottom — nobody knows where it is until it's in the rear-view mirror. The Canadian "Brick-and-Mortar" Retirement Strategy Listen up, homeowners. Canadians whose retirement plan is pretty much: buy a home, pay it off, and repeat; "we're mortgage-free" with pride. This strategy is very common and effective. But let's be honest: if your home is part of your retirement plan, economic changes matter even more. If you’re in this camp, you need to accept the facts and plan how you'll use your equity to secure your retirement. It’s better to have a ready, aim, fire approach than the more typical fire, ready, aim! When markets decline, central banks often cut rates. Lower rates can support real estate — but they don't guarantee rising prices. Meanwhile, inflation drives up costs, buyers' budgets fluctuate, property values can soften, and retirees feel the impact most quickly. Even a modest dip in home values creates real erosion in net worth when your home carries the bulk of your financial future. The Case for Securing Home Equity Access Now It's much easier to qualify for credit when home values are higher, finances are stable, and you're not already in a pinch. Your options: Home Equity Line of Credit (HELOC) This includes products like Manulife One: Competitive rates and flexible options — but retirees often face income qualification barriers. Reverse Mortgage: No income needed, no payments required. Plus, the No Negative Equity Guarantee — you can never owe more than your home is worth — but retirees dislike debt! HESA (Home Equity Sharing Agreement): You get cash now in exchange for sharing a percentage of your home's future appreciation. No monthly payments, not technically debt, but you give up a share of future gains. This isn't about needing money today. It's about safeguarding your future from having to sell, downsize, or rely on credit card debt because the economy experienced a mood swing. It's insurance — with a door handle. Building Your Cash Wedge: Step-by-Step Calculate 12–24 months of living expenses. Select where to store each layer (high-interest Savings Account, cashable GICs, T-Bills). Refill the wedge with income from dividends, distributions, or planned draws Monitor your situation closely. If your income is tight: consider arranging a home-equity line or reverse mortgage as a backup wedge - not an emergency scramble. Review annually — cost of living changes, inflation changes, and so should your wedge. The Bottom Line for Canadian Retirees The real question isn't "Do I need a Cash Wedge?" It's "Can I afford NOT to have one?" Retirees have limited capacity to earn income to cover shortfalls. Budgets can tighten unexpectedly. Inflation doesn't seek permission. And sometimes the thing we think we'll never need becomes the lifeline that secures our retirement. Your retirement security comes from: Owning quality investment Building reliable dividend income Preparing smart home-equity backstops Keeping emotions out of financial decisions Avoiding saving too much while living too little The Cash Wedge is the most boring tool in your retirement plan — and the most powerful. Yet most financial plans ignore it. Don't. Sue Don’t Retire… ReWire!!! Want to become an expert on serving the senior demographic? Just message me to be notified about the next opportunity to become a "Certified Equity Advocate" — mastering solution-based advising that transforms how you work with Canada's fastest-growing client segment.
“See a gap, fill a gap.” That’s how Jeffrey Klibert, Ph.D., associate director of clinical training in Georgia Southern University’s Doctor of Psychology (PsyD), described the inspiration behind a project designed to extend behavioral health services in rural areas. Filling gaps is something Klibert said has always been a challenge in behavioral health care. This challenge became steeper in the aftermath of the COVID-19 pandemic. “When COVID hit, we saw some really alarming rates of people seeking services, and there just weren’t enough providers to meet that need,” Klibert said. “We saw waitlists that were six months, eight months, sometimes a year long.” Waitlists of this length are a common occurrence in Georgia’s rural areas, where resources are scarce and reported health outcomes are among the worst in the state. Klibert, along with colleagues Lindsey Stone, Ph.D., and Thresha Yancey, Ph.D., and students, is working to improve the situation across 14 rural counties in Georgia, thanks to the renewal of a research and training grant from the Health Resources and Services Administration. Stone and Yancey will supervise the trainees, while Klibert will oversee the entire program. The grant enables quantitative and qualitative research to increase access to behavioral health care in rural areas, while also providing Georgia Southern’s fourth-year PsyD students with hands-on training through local care providers. The ultimate goal is to develop more efficient and effective models for interprofessional, team-based care in areas of the state where it is most needed. “Everybody sees the need. We just need the glue to link everybody together,” Klibert said. “That’s what the program is trying to be. It’s trying to build those bridges to create a more comprehensive system of care.” Students will provide a range of services in collaboration with local care providers, including psychological assessments and therapy for individuals and families. Alex Cudd, a fourth-year PsyD student who joined the program in August, calls the experience “invaluable” and hopes to join the 94% of program alumni who currently provide care in rural settings. “In just a few months, I’ve learned so much about providing well-rounded care,” Cudd said. “I know I’ll carry this training into my career.” CarePartners of Georgia (CPGA), a resiliency- and recovery-based behavioral health agency serving Bulloch, Candler and Emanuel counties, is among the local providers partnering with Georgia Southern. “All the interns we’ve had from Georgia Southern understand the concept of recovery, are trauma-informed and very effective at delivering services,” said CPGA CEO David Crooke. “It’s been mutually beneficial. We are helping them further their education, and they quickly become important members of our team due to the breadth and depth of their knowledge.” Klibert notes that the grant’s initial four-year term brought significant improvements in local healthcare networks and enhanced communication between providers, something he sees as an investment in lasting success. “We’re doing some exciting stuff, but at the end of the day, we are very aware of making sure what we’re doing sticks and that we have the resources to continue care after the grant ends,” Klibert said. Looking to know more about Georgia Southern University's Doctor of Psychology Program or arrange an interview with Jeffrey Klibert — simply contact Georgia Southern's Director of Communications Jennifer Wise at jwise@georgiasouthern.edu to arrange an interview today.
MEDIA RELEASE: New CAA Study Sheds Light on Edible Cannabis and Collision Risk Among Young Drivers
A recent study with funding support from CAA, conducted by the University of Saskatchewan, examined 50 drivers aged 19 to 30 to assess how consuming edible cannabis influences collision risk among young drivers. This demographic, which is known for having a higher tendency to engage in risky driving behaviour, currently holds the highest crash rates nationwide. “This study marks an important first step in understanding how cannabis edibles impact driving performance,” says Michael Stewart, Community Relations Consultant for CAA South Central Ontario. “Too often, decisions about whether someone is fit to drive are made in the moment, relying on judgment rather than evidence. Cannabis impairment studies like this are essential. Each one brings new learnings that help us refine our approach and ensure that safety is never left to chance.” The findings indicate that critical driving skills, including reaction time, lane discipline, and speed control, were impaired. Consumption times may vary to feel the effects of edible cannabis from driver to driver. However, the study found that impairment was most evident at 90 minutes after consumption, so its effects may not be noticeable until a motorist is already behind the wheel. When asked if they felt safe to drive after consuming edibles, only four per cent felt safe getting behind the wheel 90 minutes after eating an edible cannabis product. What is interesting about this is that in a controlled environment, young drivers feel unsafe driving under the influence of cannabis. However, a recent survey of 1,510 Ontario drivers from CAA SCO shows that drivers often have a false sense of confidence when they have driven high in the past. The perception of safety doesn’t match reality The survey found that the number of people admitting to cannabis-impaired driving in Ontario (nearly 20 per cent) has remained stable compared to last year. However, a concerning trend has emerged, with more cannabis-impaired drivers (78 per cent) saying they are confident in their driving abilities while under the influence – a 13 per cent overall increase from 2021. Why is this concerning? The perception of safety doesn’t match reality. More than a third of cannabis-impaired drivers acknowledged feeling high while driving, relying on their personal judgment for signs of impairment, such as drowsiness, slowed reaction time, or brain fog. “This misplaced confidence can lead to dangerous decisions, increasing the risk of collisions and endangering road users,” adds Stewart. “We must recognize that getting behind the wheel is not just a personal choice it’s a responsibility that affects the safety of everyone on our roads.” Growing issue of poly-use The research also points to a growing issue of poly-use, or the consumption of multiple substances and is on the rise. This trend adds another layer of complexity to road safety efforts, as the combined effects of different substances can further impair judgment and reaction times. Most respondents (57 per cent) say they consume cannabis in combination with other substances – most commonly, alcohol. However, painkillers, psilocybin, ecstasy, and MDMA are on the rise. CAA SCO continues to advocate for safer roads by encouraging motorists to make responsible choices. The message is clear: do not get behind the wheel when impaired. “While we’re all aware that alcohol-impaired driving can be dangerous, we should also take the same attitude towards cannabis-impaired driving,” says Stewart. “With the holiday season coming up, cannabis can be consumed legally and responsibly but should never be used when driving.” CAA is asking that those who do consume cannabis, alcohol or other drugs to plan ahead by making alternate arrangements, such as a designated driver or using a rideshare service, to get home safely this holiday season. Methodology The online survey was conducted by DIG Insights from June 27 to July 14, 2025, with 1,510 Ontario drivers aged 19 and older. Based on the sample size of n=1,510 and with a confidence level of 95 per cent, the margin of error for this research is +/- 2%.) Methodology of the University of Saskatchewan study The study collected extensive data from 50 young adult drivers (aged 19–30), resulting in 250 assessments across multiple realistic driving scenarios using a simulator after consuming a 10mg THC edible.
Let's get one thing straight: the stock market doesn't care that you're retired. It doesn't care that you finally cleaned out that drawer full of ancient T4 slips, promised yourself you'd stop checking your RRIF balance daily, or told your spouse, "This year, we're sticking to the plan." The Market Doesn't Care About Your Retirement Date Markets wobble because they wobble. Headlines panic. Analysts disagree sharply — and confidently. And somewhere, a retiree stands in front of the fridge, wondering whether to sell everything or simply turn off the news. But retirement isn't a day-trading contest; it's a decades-long longevity project. The aim is to generate reliable income, maintain sleep-at-night discipline, and avoid the common mistake among retirees of saving too much while living too little. Your Retirement Income Defense: Sectors That Weather Any Storm Read the news, and you'll see a constant blizzard of rising prices created by our neighbours to the south. Not just little price increases, but if economists are right about what we can expect, it's best to “inflation-proof” yourself - before you need it. But keep in mind, every downturn follows the same pattern: a few key sectors keep humming while everything else goes through a mild identity crisis. The Classic Defensive Trio for Canadian Retirees: Consumer Staples (groceries, household essentials) Utilities (keeping the lights on and heat up) Healthcare (aging doesn't pause for recessions) Research on past downturns shows these sectors experienced significantly smaller losses than the S&P 500 during selloffs. When markets tantrum, these industries act like the sensible cousin who says, "We'll get through this. Have a muffin." Canadian-Specific Additions: Telecoms (we'll cut many things, but not Wi-Fi) Pipelines (fee-for-service revenue, though rate-sensitive) Combine these with low-volatility or dividend ETFs, and your portfolio suddenly feels less like a roller coaster and more like a slow-moving Via Rail train: reasonably steady, unfussy, and you still get to where you're going. The Cash Wedge: And Why You Need One Think of your retirement plan as a three-layer cake: Long-term investments (stocks, dividend ETFs, balanced portfolios) Intermediate safety assets (short GICs, T-bills, high-interest savings) Cash you can actually live on (your wedge) Your Cash Wedge sits at the very front of the line — a 12–24-month cushion of living expenses held in stable, boring, absolutely-not-newsworthy places: High-interest savings accounts Short-term GICs Treasury bills Cashable deposits It's essentially the "dry powder" you need to ride through market volatility without panic-selling. Three Critical Risks Your Cash Wedge Protects Against 1. Sequence-of-Returns Risk in Early Retirement This is the risk that markets drop early in your retirement while you're withdrawing. It's the silent killer of portfolios. A cash wedge buys you: Time for dividends to arrive Time for markets to recover Time for calm to return 2. Emotional Decision-Making During Market Downturns When markets fall, too many retirees experience "sell-and-suffer syndrome": They sell low Lock in losses Delay recovery Reduce the lifespan of their savings 3. Portfolio Depletion at Critical Moments Without a cash wedge, every withdrawal during a downturn digs a deeper hole. With a cash wedge, withdrawals can pause while investments rebound. "Think of a cash wedge as retirement jiu-jitsu — using stability to neutralize volatility." How to Calculate Your Ideal Cash Wedge Size There's no magic number, but here's a practical framework: 12 months of essential expenses for retirees with pensions or steady income sources 18 months for those relying heavily on investments 24 months for anyone highly risk-averse or aging in place on a fixed budget This isn't a pile of cash sitting in a chequing account — it's a structured, laddered buffer. Why Canadian Retirees Often Resist Building a Cash Wedge I've heard all of these comments over the years from many retirees: "Cash earns nothing." Not true anymore — HISAs and T-bills offer competitive yields. "I don't want my money sitting around doing nothing." It isn't doing nothing — it's protecting your future income. "I've always been fully invested." Retirement changes the rules. What worked during the accumulation phases of retirement can be dangerous during deaccumulation. The Cash Wedge is not an investment strategy. It is an income preservation strategy — the most important one in retirement. Real-Life Example: The 2020 Market Crash Test Remember 2020? Stock markets dropped nearly 35% in just weeks. Let's consider two couples with similar assets: Couple A : had a 2-year cash wedge Couple B : had none Couple A simply shifted withdrawals from their wedge, not their portfolio. Couple B sold their best assets at their worst prices — causing permanent damage. This is why I tell retirees: "The Cash Wedge protects your portfolio from you." It’s 12–24 months of living expenses kept in cash, high-interest savings accounts (HISA), short-term GICs, or T-Bills. It's not exciting. No one flaunts a 6-month GIC at brunch. But the emergency fund prevents disaster: selling investments at the worst possible time. It buys you time. It buys you calm. It buys you the uninterrupted ability to buy groceries. The Cash Wedge alone is powerful. But for Canadian homeowners — especially those whose wealth sits mostly in their property — there’s a second buffer that can dramatically strengthen your financial resilience: your home equity. We'll explore that in Part 2 of this post tomorrow. Sue Don’t Retire… ReWire!!! Want to become an expert on serving the senior demographic? Just message me to be notified about the next opportunity to become a "Certified Equity Advocate" — mastering solution-based advising that transforms how you work with Canada's fastest-growing client segment.
The Conversation: A UF neuroscientist explains the science of pain
Nobody likes to feel pain, but it’s something every person will experience at some point in their life. But why is that? I am a neuroscientist, and my job is to research why and how people feel pain in order to help doctors understand how to treat it better. What is pain? To understand why people feel pain, it helps first to understand what pain is. Pain is the unpleasant sensation you feel when your body is experiencing harm, or thinks it is. Not everyone experiences pain the same way. Pain is a highly personal experience influenced by a variety of biological, psychological and social factors. For example, research has shown differences in the pain experiences of women and men, young and older people, and even across people from different cultures. Danger signals A network of nerves similar to wires runs all through the human body, from the tips of your fingers and toes, through your back inside the spinal cord and up to your brain. Specialized pain receptors called nociceptors can be found at the end of the nerves on your skin, muscles, joints and internal organs. Each nociceptor is designed to activate its nerve if it detects a danger signal. One way scientists classify nociceptors is based on the type of danger signal that activates them. Mechanical nociceptors respond to physical damage, such as cuts or pressure, while thermal nociceptors react to extreme temperatures. Chemical nociceptors are triggered by chemicals that the body’s own tissues release when they are damaged. These receptors may also be triggered by external irritants, such as the chemical capsaicin, which gives chili peppers their heat. This is why eating spicy food can cause you pain. Finally, there are the nociceptors that are activated by a combination of various triggers. For example, one of these receptors in your skin could be activated by the poke of a sharp object, the cold of an ice pack, the heat from a mug of cocoa, a chemical burn from household bleach, or a combination of all three kinds of stimulation. How pain travels though the body When you fall and get a scrape, the mechanical nociceptors in your skin spring into action. As soon as you hit the ground, they activate an electrical signal that travels through the nearby nerves to the spinal cord and up to your brain. Your brain interprets these signals to locate the place in your body that is hurting and determine how intense the pain is. Your brain knows that a pain signal is an SOS message from your body that something isn’t right. So it activates multiple systems all at once to get you out of danger and help you survive. Your brain may call on other parts of your nervous system to release chemicals called endorphins that will reduce your pain. It may tell your endocrine system to release hormones that prepare your body to handle the stress of your fall by increasing your heart rate, for example. And it may order your immune system to send special immune cells to the site of your scrape to help manage swelling and heal your skin. As all of this is happening, your brain takes in information about where you are in the world so that you can respond accordingly. Do you need to move away from something hurting you? Did you fall in the middle of the road and now need to get out of the way of moving cars? Not only is your brain working to keep you safe in the moments after your fall, it also is looking ahead to how it can prevent this scenario from happening again. The pain signals from your fall activate parts of your brain called the hippocampus and anterior cingulate cortex that process memory and emotions. They will help you remember how bad falling made you feel so that you will learn how to avoid it in the future. But why do we need to feel pain? As this example shows, pain is like a warning signal from your body. It helps protect you by telling you when something is wrong so that you can stop doing it and avoid getting hurt more. In fact, it’s a problem if you can’t feel pain. Some people have a genetic mutation that changes the way their nociceptors function and do not feel pain at all. This can be very dangerous, because they won’t know when they’re hurt. Ultimately, feeling that scrape and the pain sensation from it helps keep you safe from harm. Yenisel Cruz-Almeida is a UF Associate Professor of Community Dentistry and Associate Director of the Pain Research & Intervention Center Of Excellence, University of Florida This article is republished from The Conversation's Curious Kids series under a Creative Commons license. Read the original article:
Georgia Southern faculty featured on prestigious top 2% of scientists list
Twelve outstanding active faculty members from Georgia Southern University were featured on Stanford and Elsevier’s 2025 list of the top 2% of scientists in the world. This annual list features scientists whose work has had the highest citation count and citation impact in their fields within a given year. This year’s Georgia Southern honorees represent a diverse range of disciplines, from physics and chemistry to epidemiology and business. Ten of the 12 faculty members were also featured on last year’s list. Vice President for Research and Economic Development David Weindorf, Ph.D, P.G., is among them and takes pride in seeing so many familiar names, and a couple of new ones, included. “Seeing names from so many different disciplines, both old and new, speaks volumes about our growth and consistency,” said Weindorf. “I’m so thankful for these faculty who relentlessly pursue excellence and truly embody growing ourselves to grow others in research.” Check out who made the list from Georgia Southern by clicking on the attached media release below: Looking to know more about Georgia Southern University and it's nationally recognized faculty — simply contact Georgia Southern's Director of Communications Jennifer Wise at jwise@georgiasouthern.edu to arrange an interview today.