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People Aren’t Just Afraid of the Dark, They’re Afraid of Nighttime

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There’s a reason people are afraid of things that go bump in the night. Once the sun goes down, people are more sensitive to scary stimuli. That jumpiness may have more to do with the time of day than the darkness, a new study in the International Journal of Psychophysiology explains. 

A group of Chinese researchers tested the links between fear, darkness, and nighttime by splitting a group of women into four groups and exposing them to scary sights and sounds; the women were monitored for spikes in heart rate and perspiration. Some participants looked at scary pictures and listened to scary sounds during the day with all the lights on, while others looked at the pictures during the day, but in darkness. Some viewed them at night with a dim light, and others at night in complete darkness except for the computer screen. 

Those who undertook the task at night found the pictures and sounds scarier than did the women who had to examine them during the day, regardless of the light condition. By contrast, their reaction to neutral pictures and sounds didn’t vary based on the time of day. 

The study only tested young female participants in China (the average age was 22), so it's far from definitive. Fear could affect men and women and people of different ages and cultures differently. But this does suggest that there could be a circadian rhythm to fear, and that biologically, we’re more inclined to be afraid of things at nighttime. As humans aren’t nocturnal animals, but plenty of predators are, it makes sense that we would learn to be a little more sensitive to threatening sights and sounds in the night. 

[h/t BPS Research Digest]

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Feeling Anxious? Just a Few Minutes of Meditation Might Help
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Some say mindfulness meditation can cure anything. It might make you more compassionate. It can fix your procrastination habit. It could ward off germs and improve health. And it may boost your mental health and reduce stress, anxiety, depression, and pain.

New research suggests that for people with anxiety, mindfulness meditation programs could be beneficial after just one session. According to Michigan Technological University physiologist John Durocher, who presented his work during the annual Experimental Biology meeting in San Diego, California on April 23, meditation may be able to reduce the toll anxiety takes on the heart in just one session.

As part of the study, Durocher and his colleagues asked 14 adults with mild to moderate anxiety to participate in an hour-long guided meditation session that encouraged them to focus on their breathing and awareness of their thoughts.

The week before the meditation session, the researchers had measured the participants' cardiovascular health (through data like heart rate and the blood pressure in the aorta). They evaluated those same markers immediately after the session ended, and again an hour later. They also asked the participants how anxious they felt afterward.

Other studies have looked at the benefits of mindfulness after extended periods, but this one suggests that the effects are immediate. The participants showed significant reduction in anxiety after the single session, an effect that lasted up to a week afterward. The session also reduced stress on their arteries. Mindfulness meditation "could help to reduce stress on organs like the brain and kidneys and help prevent conditions such as high blood pressure," Durocher said in a press statement, helping protect the heart against the negative effects of chronic anxiety.

But other researchers have had a more cautious outlook on mindfulness research in general, and especially on studies as small as this one. In a 2017 article in the journal Perspectives on Psychological Science, a group of 15 different experts warned that mindfulness studies aren't always trustworthy. "Misinformation and poor methodology associated with past studies of mindfulness may lead public consumers to be harmed, misled, and disappointed," they wrote.

But one of the reasons that mindfulness can be so easy to hype is that it is such a low-investment, low-risk treatment. Much like dentists still recommend flossing even though there are few studies demonstrating its effectiveness against gum disease, it’s easy to tell people to meditate. It might work, but if it doesn't, it probably won't hurt you. (It should be said that in rare cases, some people do report having very negative experiences with meditation.) Even if studies have yet to show that it can definitively cure whatever ails you, sitting down and clearing your head for a few minutes probably won't hurt.

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Reading Aloud to Your Kids Can Promote Good Behavior and Sharpen Their Attention
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Some benefits of reading aloud to children are easy to see. It allows parents to introduce kids to books that they're not quite ready to read on their own, thus improving their literacy skills. But a new study published in the journal Pediatrics shows that the simple act of reading to your kids can also influence their behavior in surprising ways.

As The New York Times reports, researchers looked at young children from 675 low-income families. Of that group, 225 families were enrolled in a parent-education program called the Video Interaction Project, or VIP, with the remaining families serving as the control.

Participants in VIP visited a pediatric clinic where they were videotaped playing and reading with their children, ranging in age from infants to toddlers, for about five minutes. Following the sessions, videos were played back for parents so they could see how their kids responded to the positive interactions.

They found that 3-year-olds taking part in the study had a much lower chance of being aggressive or hyperactive than children in the control group of the same age. The researchers wondered if these same effects would still be visible after the program ended, so they revisited the children 18 months later when the kids were approaching grade-school age. Sure enough, the study subjects showed fewer behavioral problems and better focus than their peers who didn't receive the same intervention.

Reading to kids isn't just a way to get them excited about books at a young age—it's also a positive form of social interaction, which is crucial at the early stages of social and emotional development. The study authors write, "Such programs [as VIP] can result in clinically important differences on long-term educational outcomes, given the central role of behavior for child learning."

Being read to is something that can benefit all kids, but for low-income parents working long hours and unable to afford childcare, finding the time for it is often a struggle. According to the 2011-2012 National Survey of Children’s Health, only 34 percent of children under 5 in families below the poverty line were read to every day, compared with 60 percent of children from wealthier families. One way to narrow this divide is by teaching new parents about the benefits of reading to their children, possibly when they visit the pediatrician during the crucial first months of their child's life.

[h/t The New York Times]

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