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Today, people who can't speak or write because of paralysis have very limited ways of communicating, e.g. using a pointer to touch words or letters on a screen or having computers track their eye movements. In a medical first, researchers harnessed the brain waves of a paralyzed man unable to speak - and turned what he intended to say into sentences on a computer screen. Dr. Edward Chang, a neurosurgeon at the University of California, San Francisco, led the work in developing a "speech neuroprosthetic" -- decoding brain waves that normally control the vocal tract, the tiny muscle movements of the lips, jaw, tongue and larynx that form each consonant and vowel.

Emotional contagion is the phenomenon of "catching" other people's emotions and moods. According to Elaine Hatfield, a psychology professor at the University of Hawaii, humans are hard-wired "to automatically mimic and synchronize facial expressions, vocalizations, postures, and movements with those of another person and, consequently, to converge emotionally." Primitive emotional contagion is a basic building block of human interaction. It helps us coordinate and synchronize with others, empathize with them, and read their minds-all critical survival skills. When we mimic, the body gets feedback about the expressions we've taken on; we then feel what the other person is feeling. Gary Slutkin, a physician, epidemiologist, and founder and CEO of the nonprofit Cure Violence, says that emotional contagion, specifically anger and violence, springs from four mechanisms involving the brain: 1. Engagement of the cortical pathways for copying, a behavior related to mimicry. The most contagious behaviors are the most emotionally engaging, as well as the ones carried out by the people who are most relevant to you. 2. Activation of the brain's dopamine system, which works in anticipation of a reward. "Activation of that system puts you down a pathway toward what is important socially and for survival," he says. If you anticipate being rewarded for responding to someone with anger or violence, you are more likely to get on that behavioral track. 3. The brain's pain centers activate from veering off or being shut out from getting a reward. "A sense of I can't stand it lights up in the context of disapproval." 4. Serious injuries or abuse cause the limbic system and amygdala in the lower brain to become hyperreactive. "This causes you to be less in control, which accelerates violent behavior," Slutkin says. It also makes you more likely to get angry and be quick to react. "Then there's hostile attribution, another part of what happens with the limbic sy

Written language is an imperfect method for the messy, complex business of communication, where facial expressions, gestures and vocal tones transmit oceans of meaning and subtext - for those, at least, who can read them. Words themselves offer none of that: In a famous study, Albert Mehrabian, a psychology professor at U.C.L.A., found that humans tend to perceive only a fragment of a speaker's meaning through spoken words. Instead, he observed, most meaning is gleaned from body language and tone of voice. In a text-only environment, how can we ever be certain other people understand what we mean when we post online? Enter tone indicators. Tone indicators are paralinguistic signifiers used at the ends of statements to help readers fill in the blanks. Put simply, they are written shorthand for the poster's intent and emotion. One might use "/srs," short for "serious," to express sincere affection for a pop culture crush.

Forcing language isn't possible, it just happens on its own. Many people have looked down and wanted to get rid of these speech features but surprisingly using filler words says a few things about a person. Saying "um" doesn't just fill in pauses but also signals a new topic/idea wanting to be mentioned in the conversation. Whenever someone says filler words, they are working hard in a conversation. The article also goes into how women adopted vocal fry, which is where a person goes into their lowest register and usually sound very raspy and creaky. Many people complain about it but it's all cultural bias. The bias that people have on women's voice affects how people view speech feature that they have contributed to the English language.

The urge to converse with animals is age-old, long predating the time when smartphones became our best friends. A new app, is the product of a growing interest in enlisting additional intelligences - machine-learning algorithms - to decode animal communication. The app detects and analyzes cat utterances in real-time, assigning each one a broadly defined "intent," such as happy, resting, hunting or "mating call." It then displays a conversational, plain English "translation" of whatever intent it detects. MeowTalk uses the sounds it collects to refine its algorithms and improve its performance, the founders said, and pet owners can provide in-the-moment feedback if the app gets it wrong. In 2021, MeowTalk researchers reported that the software could distinguish among nine intents with 90 percent accuracy overall. But the app was better at identifying some than others, not infrequently confusing "happy" and "pain," according to the results. Dogs could soon have their own day. Zoolingua, a start-up based in Arizona, is hoping to create an A.I.-powered dog translator that will analyze canine vocalizations and body language. Still, even sophisticated algorithms may miss critical real-world context and cues, said Alexandra Horowitz, an expert on dog cognition at Barnard College. For instance, much of canine behavior is driven by scent. "How is that going to be translated, when we don't know the extent of it ourselves?" Dr. Horowitz said in an email.

If you're looking for the species that most closely matches our linguistic prowess, surprisingly, you won't find it in the apes, the primates, or even in the mammals. You have to travel to a far more distant relative, all the way to a family of birds known as the songbirds. The vocal life of a songbird is similar to ours in many ways. They learn songs by imitating their elders. Like human speech, these songs are passed down from one generation to the next. Songbirds are also best equipped to learn songs in their youth, and they have to practice to develop their ability. They can improvise and string together riffs into new songs, and over generations these modified songs can turn into new dialects. And like us, they come hard-wired with 'speech-centers' in their brain that are dedicated to language processing. An experiment from 2009 by Fehér and colleagues took newly hatched songbirds of the zebra finch species and raised them in sound proof chambers. They did this during their critical period of language development. Surprisingly, this culturally isolated generation of birds began to develop their own songs. These songs were less musical than your typical songbird song - they had irregular rhythms, they would stutter their notes, and the notes would sound more noisy. But the researchers were curious where this would lead. They listened to the songs of the next few generations of pupils, the offspring of these children of silence. What they found was quite amazing. In just two generations, the songs started to change in unexpected ways - they were becoming more musical. In fact, they started to converge upon the song of the wild songbirds, even though none of these birds had ever heard the wild songs. The Feher study suggests, but does not prove, that songbirds must have an innate understanding of the structures of their language. In other words, they seem to have a built-in intuition about grammar. Over time, they may be using these intuitions to develo

When a human baby is born, its first cry is a normal sign of good health. Having never taken a breath before, the baby signals its first inhalation and exhalation-in the form of a screech. How do babies know to create a sound they've never made before? And is their first yelp truly the start of speech development? As it turns out, human babies may be practicing how to cry long before they ever make a sound. That is, if they're anything like marmosets, humans' primate cousins. A study of marmosets by Daniel Takahashi, a co-author of the study and an animal behaviorist at the Brain Institute at the Federal University of Rio Grande do Norte in Brazil. shows fetal monkeys practicing crying in the womb. Takahashi notes, "marmosets are monkeys that we know vocalize a lot, and they share a lot of features with humans." For instance, both male and female parents raise their offspring together, and unlike other primates, marmoset babies are relatively helpless when they're born, like human infants. Takahashi says the central finding will help illuminate when speech development begins, and that studying pre-birth-rather than the moment of birth-may help identify speech or motor development problems earlier. "There are a lot of things going on in the womb that might be relevant to what's going on afterwards," he says.