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Pollyanas Are Good Lie Detectors

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In 1913, Eleanor H. Porter published a young adult's book, Pollyanna, about a girl who finds the good in everything. Soon, Pollyanna became synonymous with naively optimistic people—people who are often too trusting and easily duped. This stereotype appears to be misleading; trusting people are better able to detect duplicity than untrusting folks.


Nancy Carter and Mark Weber from the Rotman School of Management at the University of Toronto videotaped second-year MBA students interviewing for a fake job. The researchers instructed half of the interviewees to be absolutely honest and the other half to lie. All of the participants received $20 for their efforts and Carter and Weber promised the interviewees an additional $20 if a lie detection expert believed they were telling the truth.

The researchers then asked a different group of participants to answer a survey, assessing the amount of trust they place in others. The participants watched the tapes and evaluated how honest they believed each interviewee was. Those people who were more trusting were better able to discern whom the liars were whereas less trusting people had a difficult time differentiating between liars and truth tellers.

"Although people seem to believe that low trusters are better lie detectors and less gullible than high trusters, these results suggest that the reverse is true," the coauthors write in the paper, which appears in Social Psychological and Personality Science. "High trusters were better lie detectors than were low trusters; they also formed more appropriate impressions and hiring intentions."

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Health
Scientist Asks: Why Do We Weep?
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Sometimes we see the tears coming, and sometimes they catch us off guard; we find ourselves weeping without knowing why. It's a personal problem, but it's a scientific one, too: Why do people weep? What purpose does it serve? One expert attempts to answer these questions in a new article in the journal New Ideas in Psychology.

Article author Carlo V. Bellieni is a pediatrician and a bioethicist at Siena University Hospital in Italy. His previous studies have focused on children's emotional well-being and babies' crying and pain. For his latest paper, he examined data and observations on weeping from more than 70 studies and books from researchers stretching back all the way to Charles Darwin.

His conclusion? Weeping is "a complex phenomenon."

For starters, Bellieni writes, weeping is similar to crying, but it's not the same thing. Crying is typically a reaction to pain or anger. It's audible and physical, increasing heart rate, affecting breathing, and contorting the face and body. A crying person's voice changes, and their body makes more stress hormones like adrenaline. And while they don't shed tears, other animals cry, too.

Weeping, on the other hand, appears to be uniquely human. It's what happens when the cup of our emotions runneth over. We cry when we drop a cinderblock on our foot. We weep at funerals, and at weddings.

As Bellieni discovered, there are many theories on how we cry and weep, and where the tears come from. Some researchers have argued that we make tears to return ourselves to the soothing, fluid environment of the womb. Others theorize that our bodies start extruding tears (and snot) to keep our nose and throat from drying out as our breathing intensifies. Darwin's hypothesis was that the tears are a byproduct of scrunching up our faces, including the tear-production glands.

None of these theories seem especially plausible, Bellieni writes. So for now, the answer to the physical question is, "We don't really know."

The emotional and social sides of the weeping equation are slightly more straightforward.

Weeping is a form of releasing intense emotion and physical tension. When we weep, we tell our body that it's okay to relax. This helps us reset our system, so to speak, and move on.

And seeing someone weep makes us want to help them, Bellieni says. Weeping makes other people want to help us. Visible sorrow is an opportunity to strengthen social ties. And among social animals like us, strong bonds mean a better chance of survival.

It's wrong to think of weeping as wimpy or weak, Bellieni says. In fact, it's "a strong behavior with positive effects on health and social interaction."

"In the light of these data," he concludes, "weeping appears to be a primal and important human behavior that deserves more attention."

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science
If You’ve Ever Seen a Ghost, Science May Explain Why
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Despite all the reports of ghost sightings (28 percent of Americans report having ghostly encounters), there’s zero evidence to support the presence of supernatural beings among us. Science may not prove the existence of ghosts, but it can help explain why people think they see ghosts in the first place.

In this video from Vox, paranormal investigator Joe Nickell identifies some of the phenomena believers may mistake for paranormal activity. One possible explanation is infrasound, or the sound waves that fall beneath levels of human perception. Though we can’t hear these noises firsthand, our bodies sense them in other ways. This can cause chills, feelings of unease and depression, and even hallucinations.

Other contributors may include sleep paralysis (when you wake up while your body is immobile and experience waking nightmares) and grief. There are also a few less common possibilities that aren’t covered in the video below: Mold poisoning, for instance, can lead to irrational fear and dementia. Suddenly, a visit from a poltergeist doesn’t sound so scary.

[h/t Vox]

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