It was 80 years ago that the idea of negative memories fading faster was first proposed. Back in the 1930s psychologists collected recollections about life events like people's holidays - marking them as pleasant or unpleasant. Weeks later an unannounced request came from the researchers to recall their memories. Of the unpleasant experiences nearly 60% were forgotten - but only 42% of the pleasant memories had faded.

“Students who already believe they are not as academically successful as their more affluent peers, will further internalize defeat,” Carol Burris, a principal from Rockville Centre, wrote in the Washington Post last summer, calling on policymakers to “re-examine their belief that college readiness is achieved by attaining a score on a test, and its corollary—that is possible to create college readiness score thresholds for eight year olds.” This week, teachers at International High School at Prospect Heights, which serves a population of recently arrived immigrants from non-English-speaking countries, announced that they would not administer an assessment required by the city. A pre-test in the fall “was a traumatic and demoralizing experience for students,” a statement issued by the teachers said. “Many students, after asking for help that teachers were not allowed to give, simply put their heads down for the duration. Some students even cried.”

But intentional or not, he said, the psychological results were the same. In a second experiment, the researchers recruited 63 university students and showed them one of two Trix cereal boxes. One featured a rabbit gazing straight ahead at the viewer, while the other showed the same rabbit looking down. Afterward, the participants were asked to answer questions about the brand. Those who had gazed into the rabbit’s eyes reported higher feelings of trust and connection with Trix, and they were also more likely to choose that cereal over Fruity Pebbles.

“For lie detection to be an adaptive skill, that helps us to avoid liars and befriend truth-tellers, it doesn’t have to be conscious alarm bells. It could be more subtle,” ten Brinke says. “More of a feeling that you don’t really want to lend this person twenty dollars, that you’re not excited to go on a second date with this guy.” Ten Brinke and her colleagues decided to focus their efforts on finding evidence for unconscious lie detection.

Mr. Ai is a complex, troublesome figure: an artistic provocateur who works in several mediums, an activist and thorn in the side of the Chinese powers that be and an impresario able to marshal scores of variously adept Chinese artisans to make ambitious pieces that he barely touches. He’s also a designer and part-time architect who collaborated with the Swiss architects Herzog & de Meuron on the emblematic “Bird’s Nest” National Stadium in Beijing for the 2008 Olympics. And he was the darling of the Chinese power structure, until he began jumping in where he wasn’t invited.

‘Ai Weiwei: According to What?’

Richard Serra’s new sculpture, “East-West/West-East,” is a set of four standing steel plates rolled in Germany, shipped via Antwerp, and offloaded, trucked, and craned into place in the middle of the western Qatari desert. It’s his second public commission in Qatar—the first, a towering sculpture titled “7,” is his tallest ever—and it is being unveiled, together with a new work, at the Al Riwaq exhibition space, in Doha. “East-West/West-East,” which spans the greatest area of any of Serra’s creations, is yet another grand piece of public art purchased by the Gulf nation. The Qatar Museums Authority is estimated to spend about a billion dollars per year on art. At its head is the young Sheikha al-Mayassa Hamad bin Khalifa al-Thani, a sister of the Emir of Qatar and a Duke University graduate, who was recently named the most powerful person in the art world by ArtReview.

Herzing’s paper proposes five indicators of intelligence that any given species or machine (she includes artificial intelligence in her assessment) might combine in its own way: first, the size of the subject’s brain (if it has one) relative to the rest of the body; second, the extent to which an entity sends and receives information; third, the degree to which individual members of a species are distinct from one another; fourth, the complexity of the being’s social life; and, fifth, the amount of interaction it has with members of other species. One way to be intelligent is to score high on all five measures, as dolphins do, for instance.

Using data from more than 330,000 doctors and 12 pharmaceutical firms, it identified 58% as having received payments. It found that payments were unlikely to represent significant opportunities to educate doctors about new drugs, and that financial gain appears to be an important motive for doctors. Daniel Carlat, director of the prescription project at the non-profit group Pew Trusts, says research to date shows that doctors who have dealings with drugs reps "tend to prescribe differently". "They prescribe more drugs, more expensive drugs, more brand-name drugs, and they're less likely to follow evidence-based practice guidelines in prescribing drugs.

Artists have structurally different brains compared with non-artists, a study has found. Participants' brain scans revealed that artists had increased neural matter in areas relating to fine motor movements and visual imagery. The research, published in NeuroImage, suggests that an artist's talent could be innate. But training and environmental upbringing also play crucial roles in their ability, the authors report. As in many areas of science, the exact interplay of nature and nurture remains unclear.

Yawning is one of the first things we learn to do. “Learn” may not even be quite the right word. Johanna de Vries, a professor of obstetrics at Vrije University Amsterdam, has discovered that the human fetus yawns during its first trimester in the womb. And, unless we succumb to neurodegenerative disease, yawning is something we keep doing throughout our lives. “You don’t decide to yawn,” Robert Provine, a neuroscientist and the author of “Curious Behavior: Yawning, Laughing, Hiccupping, and Beyond,” told me. “You just do it. You’re playing out a biological program.” We yawn unconsciously and we yawn spontaneously. We can’t yawn on command—and we sometimes can’t stop ourselves from letting out a big yawn, even at the most inopportune times. (Case in point: Sasha Obama’s infamous yawn during her father’s 2013 Inaugural Address.) But what, precisely, are we accomplishing with all this yawning?

Genetic twin studies suggest that anywhere from a quarter to more than half of our propensity to be giving and caring is inherited. That leaves a lot of room for nurture, and the evidence on how parents raise kind and compassionate children flies in the face of what many of even the most well-intentioned parents do in praising good behavior, responding to bad behavior, and communicating their values.

Here are a few of the things that can make you hungry: seeing, smelling, reading, or even thinking about food. Hearing music that reminds you of a good meal. Walking by a place where you once ate something good. Even after you’ve just had a hearty lunch, imagining something delicious can make you salivate. Being genuinely hungry, on the other hand—in the sense of physiologically needing food—matters little. It’s enough to walk by a doughnut shop to start wanting a doughnut. Studies show that rats that have eaten a lot are just as eager to eat chocolate cereal as hungry rats are to eat laboratory chow. Humans don’t seem all that different. More often than not, we eat because we want to eat—not because we need to. Recent studies show that our physical level of hunger, in fact, does not correlate strongly with how much hunger we say that we feel or how much food we go on to consume. That’s something of a departure from commonly held views of what it means to be hungry.

Is big data really all it’s cracked up to be? There is no doubt that big data is a valuable tool that has already had a critical impact in certain areas. For instance, almost every successful artificial intelligence computer program in the last 20 years, from Google’s search engine to the I.B.M. “Jeopardy!” champion Watson, has involved the substantial crunching of large bodies of data. But precisely because of its newfound popularity and growing use, we need to be levelheaded about what big data can — and can’t — do.The first thing to note is that although big data is very good at detecting correlations, especially subtle correlations that an analysis of smaller data sets might miss, it never tells us which correlations are meaningful.

However, amid what often seems like the slack-jawed devolution of a once-mighty language, we can find evidence for, of all things, a growing sophistication.Yes, sophistication — even in the likes of, well, “like,” used so prolifically by people under a certain age. We associate it with ingrained hesitation, a fear of venturing a definite statement. Yet the hesitation can be seen less as a matter of confidence than one of consideration.

Feelings of aggression after playing video games are more likely to be linked to gameplay mechanics rather than violent content, a study suggests.

This interactive timeline allows you to explore the evolution of English language and literature, from the 11th century to the present day. Scroll through decade by decade to investigate the richness and diversity of our poetry and prose, as well as the many social, cultural and political strands from which our language has been woven.

Reason and Emotion