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by Bas den Hond Watch your language. Words mean different things to different people – so the brainwaves they provoke could be a way to identify you. Blair Armstrong of the Basque Center on Cognition, Brain, and Language in Spain and his team recorded the brain signals of 45 volunteers as they read a list of 75 acronyms – such as FBI or DVD – then used computer programs to spot differences between individuals. The participants' responses varied enough that the programs could identify the volunteers with about 94 per cent accuracy when the experiment was repeated. The results hint that such brainwaves could be a way for security systems to verify individuals' identity. While the 94 per cent accuracy seen in this experiment would not be secure enough to guard, for example, a room or computer full of secrets, Armstrong says it's a promising start. Techniques for identifying people based on the electrical signals in their brain have been developed before. A desirable advantage of such techniques is that they could be used to verify someone's identity continuously, whereas passwords or fingerprints only provide a tool for one-off identification. Continuous verification – by face or ear recognition, or perhaps by monitoring brain activity – could in theory allow someone to interact with many computer systems simultaneously, or even with a variety of intelligent objects, without having to repeatedly enter passwords for each device. © Copyright Reed Business Information Ltd

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry; Chapter 2: Functional Neuroanatomy: The Nervous System and Behavior
Related chapters from MM:Chapter 15: Language and Our Divided Brain; Chapter 2: Cells and Structures: The Anatomy of the Nervous System
Link ID: 20959 - Posted: 05.20.2015

By Virginia Morell Like humans, dolphins, and a few other animals, North Atlantic right whales (Eubalaena glacialis) have distinctive voices. The usually docile cetaceans utter about half a dozen different calls, but the way in which each one does so is unique. To find out just how unique, researchers from Syracuse University in New York analyzed the “upcalls” of 13 whales whose vocalizations had been collected from suction cup sensors attached to their backs. An upcall is a contact vocalization that lasts about 1 to 2 seconds and rises in frequency, sounding somewhat like a deep-throated cow’s moo. Researchers think the whales use the calls to announce themselves and to “touch base” with others of their kind, they explained in a poster presented today at the Meeting of the Acoustical Society of America in Pittsburgh, Pennsylvania. After analyzing the duration and harmonic frequency of these upcalls, as well as the rate at which the frequencies changed, the scientists found that they could distinguish the voices of each of the 13 whales. They think their discovery will provide a new tool for tracking and monitoring the critically endangered whales, which number about 450 and range primarily from Florida to Newfoundland. © 2015 American Association for the Advancement of Science.

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry; Chapter 9: Hearing, Vestibular Perception, Taste, and Smell
Related chapters from MM:Chapter 15: Language and Our Divided Brain; Chapter 6: Hearing, Balance, Taste, and Smell
Link ID: 20941 - Posted: 05.18.2015

by Jessica Hamzelou GOO, bah, waahhhh! Crying is an obvious sign something is up with your little darling but beyond that, their feelings are tricky to interpret – except at playtime. Trying to decipher the meaning behind the various cries, squeaks and babbles a baby utters will have consumed many a parent. Some researchers reckon babies are simply practising to learn to speak, while others think these noises have some underlying meaning. "Babies probably aren't aware of wanting to tell us something," says Jitka Lindová, an evolutionary psychologist at Charles University in Prague, Czech Republic. Instead, she says, infants are conveying their emotions. But can adults pick up on what those emotions are? Lindová and her colleagues put 333 adults to the test. First they made 20-second recordings of five- to 10-month-old babies while they were experiencing a range of emotions. For example, noises that meant a baby was experiencing pain were recorded while they received their standard vaccinations. The team also collected recordings when infants were hungry, separated from a parent, reunited, just fed, and while they were playing. The volunteers had to listen to a selection of the recordings then guess which situation each related to. The adults could almost always tell whether a baby was distressed in some way. This makes sense – a baby's survival may depend on an adult being able to tell whether a baby is unwell, in pain or in danger. © Copyright Reed Business Information Ltd.

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry; Chapter 12: Sex: Evolutionary, Hormonal, and Neural Bases
Related chapters from MM:Chapter 15: Language and Our Divided Brain; Chapter 8: Hormones and Sex
Link ID: 20878 - Posted: 05.04.2015

// by Jennifer Viegas Male species of a West African monkey communicate using at least these six main sounds: boom-boom, krak, krak-oo, hok, hok-oo and wak-oo. Key to the communication by the male Campbell's monkey is the suffix "oo," according to a new study, which is published in the latest issue of the Proceedings of the Royal Society B. By adding that sound to the end of their calls, the male monkeys have created a surprisingly rich "vocabulary" that males and females of their own kind, as well as a related species of monkey, understand. The study confirms prior suspected translations of the calls. For example, "krak" means leopard, while "krak-oo" refers to other non-leopard threats, such as falling branches. "Boom-boom-krak-oo" can roughly translate to, "Watch out for that falling tree branch." "Several aspects of communication in Campbell's monkeys allow us to draw parallels with human language," lead author Camille Coye, a researcher at the University of St. Andrews, told Discovery News. For the study, she and her team broadcast actual and artificially modified male Campbell's monkey calls to 42 male and female members of a related species: Diana monkeys. The latter's vocal responses showed that they understood the calls and replied in predicted ways. They freaked out after hearing "krak," for example, and remained on alert as they do after seeing a leopard. © 2015 Discovery Communications, LLC.

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry; Chapter 6: Evolution of the Brain and Behavior
Related chapters from MM:Chapter 15: Language and Our Divided Brain
Link ID: 20858 - Posted: 04.29.2015

By Sid Perkins Imagine having a different accent from someone else simply because your house was farther up the same hill. For at least one species of songbird, that appears to be the case. Researchers have found that the mating songs of male mountain chickadees (Poecile gambeli, shown) differ in their duration, loudness, and the frequency ranges of individual chirps, depending in part on the elevation of their habitat in the Sierra Nevada mountains of the western United States. The songs also differed from those at similar elevations on a nearby peak. Young males of this species learn their breeding songs by listening to adult males during their first year of life, the researchers note. And because these birds don’t migrate as the seasons change, and young birds don’t settle far from where they grew up, it’s likely that the differences persist in each local group—the ornithological equivalent of having Southern drawls and Boston accents. Females may use the differences in dialect to distinguish local males from outsiders that may not be as well adapted to the neighborhood they’re trying to invade, the team reports today in Royal Society Open Science. © 2015 American Association for the Advancement of Science

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry; Chapter 6: Evolution of the Brain and Behavior
Related chapters from MM:Chapter 15: Language and Our Divided Brain
Link ID: 20857 - Posted: 04.29.2015

By Virginia Morell Baby common marmosets, small primates found in the forests of northeastern Brazil, must learn to take turns when calling, just as human infants learn not to interrupt. Even though the marmosets (Callithrix jacchus) don’t have language, they do exchange calls. And the discovery that a young marmoset (as in the photo above) learns to wait for another marmoset to finish its call before uttering its own sound may help us better understand the origins of human language, say scientists online today in the Proceedings of the Royal Society B. No primate, other than humans, is a vocal learner, with the ability to hear a sound and imitate it—a talent considered essential to speech. But the marmoset researchers say that primates still exchange calls in a manner reminiscent of having a conversation because they wait for another to finish calling before vocalizing—and that this ability is often overlooked in discussions about the evolution of language. If this skill is learned, it would be even more similar to that of humans, because human babies learn to do this while babbling with their mothers. In a lab, the researchers recorded the calls of a marmoset youngster from age 4 months to 12 months and those of its mother or father while they were separated by a dark curtain. In adult exchanges, a marmoset makes a high-pitched contact call (listen to a recording here), and its fellow responds within 10 seconds. The study showed that the youngster’s responses varied depending on who was calling to them. They were less likely to interrupt their mothers, but not their dads—and both mothers and fathers would give the kids the “silent treatment” if they were interrupted. Thus, the youngster learns the first rule of polite conversation: Don’t interrupt! © 2015 American Association for the Advancement of Science.

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry; Chapter 6: Evolution of the Brain and Behavior
Related chapters from MM:Chapter 15: Language and Our Divided Brain
Link ID: 20828 - Posted: 04.22.2015

Jordan Gaines Lewis Hodor hodor hodor. Hodor hodor? Hodor. Hodor-hodor. Hodor! Oh, um, excuse me. Did you catch what I said? Fans of the hit HBO show Game of Thrones, the fifth season of which premieres this Sunday, know what I’m referencing, anyway. Hodor is the brawny, simple-minded stableboy of the Stark family in Winterfell. His defining characteristic, of course, is that he only speaks a single word: “Hodor.” But those who read the A Song of Ice and Fire book series by George R R Martin may know something that the TV fans don’t: his name isn’t actually Hodor. According to his great-grandmother Old Nan, his real name is Walder. “No one knew where ‘Hodor’ had come from,” she says, “but when he started saying it, they started calling him by it. It was the only word he had.” Whether he intended it or not, Martin created a character who is a textbook example of someone with a neurological condition called expressive aphasia. In 1861, French physician Paul Broca was introduced to a man named Louis-Victor Leborgne. While his comprehension and mental functioning remained relatively normal, Leborgne progressively lost the ability to produce meaningful speech over a period of 20 years. Like Hodor, the man was nicknamed Tan because he only spoke a single word: “Tan.”

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry
Related chapters from MM:Chapter 15: Language and Our Divided Brain
Link ID: 20773 - Posted: 04.10.2015

Tom Bawden Scientists have deciphered the secrets of gibbon “speech” – discovering that the apes are sophisticated communicators employing a range of more than 450 different calls to talk to their companions. The research is so significant that it could provide clues on the evolution of human speech and also suggests that other animal species could speak a more precise language than has been previously thought, according to lead author Dr Esther Clarke of Durham University. Her study found that gibbons produce different categories of “hoo” calls – relatively quiet sounds that are distinct from their more melodic “song” calls. These categories of call allow the animals to distinguish when their fellow gibbons are foraging for food, alerting them to distant noises or warning others about the presence of predators. In addition, Dr Clarke found that each category of “hoo” call can be broken down further, allowing gibbons to be even more specific in their communication. A warning about lurking raptor birds, for example, sounds different to one about pythons or clouded leopards – being pitched at a particularly low frequency to ensure it is too deep for the birds of prey to hear. The warning call denoting the presence of tigers and leopards is the same because they belong to the same class of big cats, the research found. © independent.co.uk

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry; Chapter 6: Evolution of the Brain and Behavior
Related chapters from MM:Chapter 15: Language and Our Divided Brain
Link ID: 20768 - Posted: 04.08.2015

Alice Park We start to talk before we can read, so hearing words, and getting familiar with their sounds, is obviously a critical part of learning a language. But in order to read, and especially in order to read quickly, our brains have to “see” words as well. At least that’s what Maximilian Riesenhuber, a neuroscientist at Georgetown University Medical Center, and his colleagues found in an intriguing brain-mapping study published in the Journal of Neuroscience. The scientists recruited a small group of college students to learn a set of 150 nonsense words, and they imaged their brains before and after the training. Before they learned the words, their brains registered them as a jumble of symbols. But after they were trained to give them a meaning, the words looked more like familiar words they used every day, like car, cat or apple. The difference in way the brain treated the words involved “seeing” them rather than sounding them out. The closest analogy would be for adults learning a foreign language based on a completely different alphabet system. Students would have to first learn the new alphabet, assigning sounds to each symbol, and in order to read, they would have to sound out each letter to put words together. In a person’s native language, such reading occurs in an entirely different way.

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry
Related chapters from MM:Chapter 15: Language and Our Divided Brain
Link ID: 20719 - Posted: 03.25.2015

By Nicholas Weiler Where did the thief go? You might get a more accurate answer if you ask the question in German. How did she get away? Now you might want to switch to English. Speakers of the two languages put different emphasis on actions and their consequences, influencing the way they think about the world, according to a new study. The work also finds that bilinguals may get the best of both worldviews, as their thinking can be more flexible. Cognitive scientists have debated whether your native language shapes how you think since the 1940s. The idea has seen a revival in recent decades, as a growing number of studies suggested that language can prompt speakers to pay attention to certain features of the world. Russian speakers are faster to distinguish shades of blue than English speakers, for example. And Japanese speakers tend to group objects by material rather than shape, whereas Koreans focus on how tightly objects fit together. Still, skeptics argue that such results are laboratory artifacts, or at best reflect cultural differences between speakers that are unrelated to language. In the new study, researchers turned to people who speak multiple languages. By studying bilinguals, “we’re taking that classic debate and turning it on its head,” says psycholinguist Panos Athanasopoulos of Lancaster University in the United Kingdom. Rather than ask whether speakers of different languages have different minds, he says, “we ask, ‘Can two different minds exist within one person?’ ” Athanasopoulos and colleagues were interested in a particular difference in how English and German speakers treat events. © 2015 American Association for the Advancement of Science

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry; Chapter 18: Attention and Higher Cognition
Related chapters from MM:Chapter 15: Language and Our Divided Brain; Chapter 14: Attention and Consciousness
Link ID: 20700 - Posted: 03.19.2015

By Matthew J.X. Malady One hour and seven minutes into the decidedly hit-or-miss 1996 comedy Black Sheep, the wiseass sidekick character played by David Spade finds himself at an unusually pronounced loss for words. While riding in a car driven by Chris Farley’s character, he glances at a fold-up map and realizes he somehow has become unfamiliar with the name for paved driving surfaces. “Robes? Rouges? Rudes?” Nothing seems right. Even when informed by Farley that the word he’s looking for is roads, Spade’s character continues to struggle: “Rowds. Row-ads.” By this point, he’s become transfixed. “That’s a total weird word,” he says, “isn’t it?” Now, it’s perhaps necessary to mention that, in the context of the film, Spade’s character is high off nitrous oxide that has leaked from the car’s engine boosters. But never mind that. Row-ad-type word wig outs similar to the one portrayed in that movie are things that actually happen, in real life, to people with full and total control over their mental capacities. These wordnesias sneak up on us at odd times when we’re writing or reading text. I was in a full-on wordnesiac state. On one of my spelling attempts, I think I even threw a K into the mix. It was bad. Here’s how they work: Every now and again, for no good or apparent reason, you peer at a standard, uncomplicated word in a section of text and, well, go all row-ads on it. If you’re typing, that means inexplicably blanking on how to spell something easy like cake or design. The reading version of wordnesia occurs when a common, correctly spelled word either seems as though it can’t possibly be spelled correctly, or like it’s some bizarre combination of letters you’ve never before seen—a grouping that, in some cases, you can’t even imagine being the proper way to compose the relevant term. © 2014 The Slate Group LLC.

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry
Related chapters from MM:Chapter 15: Language and Our Divided Brain
Link ID: 20688 - Posted: 03.14.2015

Ewen Callaway A mysterious group of humans from the east stormed western Europe 4,500 years ago — bringing with them technologies such as the wheel, as well as a language that is the forebear of many modern tongues, suggests one of the largest studies of ancient DNA yet conducted. Vestiges of these eastern émigrés exist in the genomes of nearly all contemporary Europeans, according to the authors, who analysed genome data from nearly 100 ancient Europeans1. The first Homo sapiens to colonize Europe were hunter-gatherers who arrived from Africa, by way of the Middle East, around 45,000 years ago. (Neanderthals and other archaic human species had begun roaming the continent much earlier.) Archaeology and ancient DNA suggest that farmers from the Middle East started streaming in around 8,000 years ago, replacing the hunter-gatherers in some areas and mixing with them in others. But last year, a study of the genomes of ancient and contemporary Europeans found echoes not only of these two waves from the Middle East, but also of an enigmatic third group that they said could be from farther east2 (see 'Ancient European genomes reveal jumbled ancestry'). Ancient genes To further pin down the origins of this ghost lineage, a team led by David Reich, an evolutionary and population geneticist at Harvard Medical School in Boston, Massachusetts, analysed nuclear DNA from the bodies of 69 individuals who lived across Europe between 8,000 and 3,000 years ago. They also examined previously published genome data from another 25 ancient Europeans, including Ötzi, the 5,300-year-old 'ice man' who was discovered on the Italian-Austrian border. © 2015 Nature Publishing Group

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry
Related chapters from MM:Chapter 15: Language and Our Divided Brain
Link ID: 20571 - Posted: 02.13.2015

by Andy Coghlan Apple's the word. Chimpanzees can learn to grunt "apple" in two chimp languages – a finding that questions how unique our own language abilities are. Researchers have kept records of vocalisations of a group of adult chimps from the Netherlands before and after the move to Edinburgh zoo. Three years later, recordings show, the Dutch chimps had picked up the pronunciation of their Scottish hosts. The finding challenges the prevailing theory that chimp words for objects are fixed because they result from excited, involuntary outbursts. Humans can easily learn foreign words that refer to a specific object, and it was assumed that chimps and other animals could not, perhaps owing to their different brain structure. This has long been argued to be one of the talents making humans unique. The assumption has been that animals do not have control over the sounds they make, whereas we socially learn the labels for things – which is what separates us from animals, says Katie Slocombe of the University of York, UK. But this may be wrong, it seems. "The important thing we've now shown is that with the food calls, they changed the structure to fit in with their new group members, so the Dutch calls for 'apple' changed to the Edinburgh ones," says Slocombe. "It's the first time call structure has been dissociated from emotional outbursts." © Copyright Reed Business Information Ltd.

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry; Chapter 6: Evolution of the Brain and Behavior
Related chapters from MM:Chapter 15: Language and Our Divided Brain
Link ID: 20560 - Posted: 02.07.2015

By Ling Xin For many, the hardest part of learning to speak Chinese is mastering its complex tonal variations. Now, new research suggests a surprising explanation for how those tones arose: a humid climate. By examining the correlation between humidity and the role of tone in more than 3700 languages, scientists found that tonal languages are remarkably rare in arid regions like Central Europe, whereas languages with complex tone pitches are prevalent in relatively humid regions such as the tropics, subtropical Asia, and Central Africa. Humidity keeps the voice box moist and elastic, allowing it to produce correct and complex tones, the scientists explain online this month in the Proceedings of the National Academy of Sciences. “If the United Kingdom had been a humid jungle, English may also have developed into a tonal language,” they claim. So, next time you go to your Chinese class, don’t forget to wet your whistle! © 2015 American Association for the Advancement of Science.

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry
Related chapters from MM:Chapter 15: Language and Our Divided Brain
Link ID: 20517 - Posted: 01.26.2015

// by Jennifer Viegas Researchers eavesdropping on wild chimpanzees determined that the primates communicate about at least two things: their favorite yummy fruits, and the trees where these fruits can be found. Of particular interest to the chimps is the size of trees bearing the fruits that they relish most, such that the chimps yell out that information, according to a new study published in the journal Animal Behaviour. The study is the first to find that information about tree size and available fruit amounts are included in chimp calls, in addition to assessments about food quality. "Chimpanzees definitely have a very complex communication system that includes a variety of vocalizations, but also facial expressions and gestures," project leader Ammie Kalan of the Max Planck Institute for Evolutionary Anthropology told Discovery News. "How much it resembles human language is still a matter of debate," she added, "but at the very least, research shows that chimpanzees use vocalizations in a sophisticated manner, taking into account their social and environmental surroundings." Kalan and colleagues Roger Mundry and Christophe Boesch spent over 750 hours observing chimps and analyzing their food calls in the Ivory Coast's Taï Forest. The Wild Chimpanzee Foundation in West Africa is working hard to try and protect this population of chimps, which is one of the last wild populations of our primate cousins. © 2015 Discovery Communications, LLC

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry; Chapter 6: Evolution of the Brain and Behavior
Related chapters from MM:Chapter 15: Language and Our Divided Brain
Link ID: 20497 - Posted: 01.20.2015

By Michael Balter If there’s one thing that distinguishes humans from other animals, it’s our ability to use language. But when and why did this trait evolve? A new study concludes that the art of conversation may have arisen early in human evolution, because it made it easier for our ancestors to teach each other how to make stone tools—a skill that was crucial for the spectacular success of our lineage. Researchers have long debated when humans starting talking to each other. Estimates range wildly, from as late as 50,000 years ago to as early as the beginning of the human genus more than 2 million years ago. But words leave no traces in the archaeological record. So researchers have used proxy indicators for symbolic abilities, such as early art or sophisticated toolmaking skills. Yet these indirect approaches have failed to resolve arguments about language origins. Now, a team led by Thomas Morgan, a psychologist at the University of California, Berkeley, has attacked the problem in a very different way. Rather than considering toolmaking as a proxy for language ability, he and his colleagues explored the way that language may helps modern humans learn to make such tools. The researchers recruited 184 students from the University of St. Andrews in the United Kingdom, where some members of the team were based, and organized them into five groups. The first person in each group was taught by archaeologists how to make artifacts called Oldowan tools, which include fairly simple stone flakes that were manufactured by early humans beginning about 2.5 million years ago. This technology, named after the famous Olduvai Gorge in Tanzania where archaeologists Louis and Mary Leakey discovered the implements in the 1930s, consists of hitting a stone “core” with a stone “hammer” in such a way that a flake sharp enough to butcher an animal is struck off. Producing a useful flake requires hitting the core at just the right place and angle. © 2015 American Association for the Advancement of Science.

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry; Chapter 6: Evolution of the Brain and Behavior
Related chapters from MM:Chapter 15: Language and Our Divided Brain
Link ID: 20482 - Posted: 01.14.2015

By DOUGLAS QUENQUA A sparrow’s song may sound simple, consisting of little more than whistles and trills. But to the sparrows, those few noises can take on vastly different meanings depending on small variations in context and repetition, researchers have found. In humans, the ability to extract nearly endless meanings from a finite number of sounds, known as partial phonemic overlapping, was key to the development of language. To see whether sparrows shared this ability, researchers at Duke University recorded and analyzed the songs of more than 200 Pennsylvania swamp sparrows. They found that the sparrows’ whistles could be divided into three lengths: short, intermediate and long. The researchers then played the sparrows two versions of the songs — the original and a slightly altered one. They found that replacing a single short whistle with an intermediate one, for example, could significantly alter a bird’s reaction, but only if it came at the right moment in the song. “Identical sounds seemed to belong to a different category depending on the context,” said Robert F. Lachlan, a biologist now with Queen Mary University of London and the lead author of the study. The findings, which were published in Proceedings of the National Academy of Sciences, are part of a larger effort to better understand how human language evolved. If even birds rely on phonemic overlapping to communicate, Dr. Lachlan said, it could indicate that such features “developed independently of higher aspects of language.” © 2015 The New York Times Company

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry; Chapter 12: Sex: Evolutionary, Hormonal, and Neural Bases
Related chapters from MM:Chapter 15: Language and Our Divided Brain; Chapter 8: Hormones and Sex
Link ID: 20471 - Posted: 01.13.2015

by Lisa Seachrist Chiu Just before winter break, my fifth grader came home from school, opened her mouth and produced what sounded to me like a stuttering mess of gibberish. After complaining that when she spends the entire day immersed in Chinese, she sometimes can’t figure out what language to use, she carried on speaking flawless English to me and Chinese to a friend while they did their homework. Quite honestly, I had been eagerly anticipating this very day for a long time. Having worked several years to establish the Chinese language immersion elementary school my daughter attends, I could barely contain my excitement at this demonstration that she truly grasps a second language. Early language programs are hot, in no small part because, when it comes to language, kids under the age of 7 are geniuses. Like many parents, I wanted my child to be fluent in as many languages as possible so she can communicate with more people and because it gives her a prime tool to explore different cultures. Turns out, it may also benefit her brain. With the help of advanced imaging tools that reveal neural processes in specific brain structures, researchers are coalescing around the idea that fluency in more than one language heightens executive function — the ability to regulate and control cognitive processes. It’s a radical shift from just a few decades ago when psychologists routinely warned against raising children who speak two languages, lest they become confused and suffer delays in learning. © Society for Science & the Public 2000 - 2014

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry; Chapter 7: Life-Span Development of the Brain and Behavior
Related chapters from MM:Chapter 15: Language and Our Divided Brain; Chapter 13: Memory, Learning, and Development
Link ID: 20448 - Posted: 01.01.2015

|By Joshua A. Krisch There is a mystery on Tiwai Island. A large wildlife sanctuary in Sierra Leone, the island is home to pygmy hippopotamuses, hundreds of bird species and several species of primates, including Campbell’s monkeys. These monkeys communicate via an advanced language that primatologists and linguists have been studying for decades. Over time, experts nearly cracked the code behind monkey vocabulary. And then came krak. In the Ivory Coast’s Tai Forest Campbell’s monkeys (Cercopithecus campbelli) use the term krak to indicate that a leopard is nearby and the term hok to warn of an eagle circling overheard. Primatologists indexed their monkey lexicon accordingly. But on Tiwai Island they found that those same monkeys used krak as a general alarm call—one that, occasionally, even referred to eagles. “Why on Earth were they producing krak when they heard an eagle,” asks co-author Philippe Schlenker, a linguist at France’s National Center for Scientific Research and professor at New York University. “For some reason krak, which is a leopard in the Tai Forest, seems to be recycled as a general alarm call on Tiwai Island.” In a paper published in the November 28 Linguistics and Philosophy Schlenker and his team applied logic and human linguistics to crack the krak code. Their findings imply that some monkey dialects can be just as sophisticated as human language. In 2009 a team of scientists travelled to Tai Forest with one mission—to terrify Campbell’s monkeys. Prior studies had collected monkey calls and then parsed vague meanings based on events that were already happening on the forest floor. But these primatologists set up realistic model leopards and played recordings of eagle screeches over loudspeakers. Their field experiments resulted in some of the best data available about how monkeys verbally respond to predators. © 2014 Scientific American

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry; Chapter 6: Evolution of the Brain and Behavior
Related chapters from MM:Chapter 15: Language and Our Divided Brain
Link ID: 20432 - Posted: 12.20.2014

|By Marissa Fessenden Songbirds stutter, babble when young, become mute if parts of their brains are damaged, learn how to sing from their elders and can even be "bilingual"—in other words, songbirds' vocalizations share a lot of traits with human speech. However, that similarity goes beyond behavior, researchers have found. Even though humans and birds are separated by millions of years of evolution, the genes that give us our ability to learn speech have much in common with those that lend birds their warble. A four-year long effort involving more than 100 researchers around the world put the power of nine supercomputers into analyzing the genomes of 48 species of birds. The results, published this week in a package of eight articles in Science and 20 papers in other journals, provides the most complete picture of the bird family tree thus far. The project has also uncovered genetic signatures in song-learning bird brains that have surprising similarities to the genetics of speech in humans, a finding that could help scientists study human speech. The analysis suggests that most modern birds arose in an impressive speciation event, a "big bang" of avian diversification, in the 10 million years immediately following the extinction of dinosaurs. This period is more recent than posited in previous genetic analyses, but it lines up with the fossil record. By delving deeper into the rich data set, research groups identified when birds lost their teeth, investigated the relatively slow evolution of crocodiles and outlined the similarities between birds' and humans' vocal learning ability, among other findings. © 2014 Scientific American,

Related chapters from BP7e: Chapter 19: Language and Hemispheric Asymmetry; Chapter 7: Life-Span Development of the Brain and Behavior
Related chapters from MM:Chapter 15: Language and Our Divided Brain; Chapter 13: Memory, Learning, and Development
Link ID: 20423 - Posted: 12.16.2014