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Psychologists who analyzed video footage of a female chimpanzee, a female bonobo and a female human infant in a study to compare different types of gestures at comparable stages of communicative development found remarkable similarities among the three species. Gestures made by all three species included reaching, pointing with fingers or the head, and raising the arms to ask to be picked up. The researchers called "striking" the finding that the gestures of all three species were "predominantly communicative," Greenfield said. To be classified as communicative, a gesture had to include eye contact with the conversational partner, be accompanied by vocalization (non-speech sounds) or include a visible behavioral effort to elicit a response. The same standard was used for all three species. For all three, gestures were usually accompanied by one or more behavioral signs of an intention to communicate. At the beginning stage of communication development, gesture was the primary mode of communication for human infant, baby chimpanzee and baby bonobo. The child progressed much more rapidly in the development of symbols. Words began to dominate her communication in the second half of the study, while the two apes continued to rely predominantly on gesture. "This was the first indication of a distinctive human pathway to language," Greenfield said. All three species increased their use of symbols, as opposed to gestures, as they grew older, but this change was far more pronounced for the human child. The child's transition from gesture to symbol could be a developmental model of the evolutionary pathway to human language and thus evidence for the "gestural origins of human language," Greenfield said. While gesture may be the first step in language evolution, the psychologists also found evidence that the evolutionary pathway from gesture to human language included the "co-evolution of gestural and vocal communication." Most of the child's gestures were accompanied b

can't access full article, but this describes how they set up research experiments to answer their questions about the relationship between speech and gesture

Spontaneous gesture can help children learn, whether they use a spoken language or sign language, according to a new report by Susan Goldin-Meadow, psychology professor at the University of Chicago. "Children who can hear use gesture along with speech to communicate as they acquire spoken language," a researcher said. "Those gesture-plus-word combinations precede and predict the acquisition of word combinations that convey the same notions. Gesture plays a role in learning for signers even though it is in the same modality as sign. As a result, gesture cannot aid learners simply by providing a second modality. Rather, gesture adds imagery to the categorical distinctions that form the core of both spoken and sign languages. Goldin-Meadow concludes that gesture can be the basis for a self-made language, assuming linguistic forms and functions when other vehicles are not available. But when a conventional spoken or sign language is present, gesture works along with language, helping to promote learning.

"Various language families differ in how they distribute components of meaning between speech and gesture--at least when referring to directional kinds of information. [...] De Ruiter is examining in greater detail the presumed interaction between speech and gesture for pointing motions. He has recorded dialogues between two people telling each other stories and has found that an extended gesture--such as when someone points up toward the sky--tends to delay the verbalization to which it refers ("the plane ascended at a steep angle"). Gestures also adapt to speech; when a storyteller has misspoken and stumbles momentarily, a preprepared gesture appears to be held in abeyance until the speech component is running smoothly again."

There are many laws of linguistics that exist in human communication. Laws such as Zipf's law of abbreviation, which predicts commonly used words to be short, and Menzerath's law, which predicts that large linguistic structures are made of shorter ones. This article talks about a study conducted by a team of researchers from the University of Roehampton, which explores the parallels of these linguistic laws in chimpanzee gestural communication. They measured the length of over 2000 gestures, and found that they indeed used shorter gestures if they were using it more frequently and long gestures were composed of the shorter ones.

Researchers at Georgia State University's Language Research Center examined how two language-trained chimpanzees communicated with a human experimenter to find food. Their results are the most compelling evidence to date that primates can use gestures to coordinate actions in pursuit of a specific goal. Dr. Charles Menzel, a senior research scientist, notes, "The chimpanzees used gestures to recruit the assistance of an otherwise uninformed person and to direct the person to hidden objects 10 or more meters away...the findings illustrate the high level of intentionality chimpanzees are capable of, including their use of directional gestures. This study adds to our understanding of how well chimpanzees can remember and communicate about their environment."

When babies point their fingers in the air, there are meanings to their gestures. Pointing is an early sign of communication, before they even start talking. It's important to foster their learning by starting with their gestures and talking to them while they move. When you mirror your child, it will help them grow confidence and show them that communication is important and effective

Everyone "talks" with their hands at least sometimes. Some people's hand-talking or gesturing matches their message well. Other people have a tendency to make overly large gestures that can be distracting. And still others don't use their hands much at all.

According to European researchers, gestures help learning languages.

Maybe this is why Italians use gestures so much :P

good bibliography on primate gesture

This seminal longitudinal study, conducted by Goodwyn, Acredolo and Brown (2000), evaluated the benefits of purposefully encouraging hearing infants to use simple gestures as symbols for objects, requests, and conditions. Researchers measured the receptive and expressive language abilities of 103 babies via standardized language tests at the age of 11, 15, 19, 24, 30, and 36 months. Their findings suggest that symbolic gesturing does not hamper children's early verbal development, and may even facilitate it. The possible reasons underlying the results: increases in infant-directed speech, infant-selected topic selection, and scaffolding that encourages communication.

Different genders speak differently, and these differences begin in the gestures that both genders use. Gesture use is very important in language development in both genders.

The GreenDot Project aims to track speaker's gesture and body language, looking for patterns and new understandings in non-verbal communication.

Two University of Washington undergraduates have won a $10,000 Lemelson-MIT Student Prize for gloves that can translate sign language into text or speech. The Lemelson-MIT Student Prize is a nationwide search for the most inventive undergraduate and graduate students. This year, UW sophomores Navid Azodi and Thomas Pryor - who are studying business administration and aeronautics and astronautics engineering, respectively - won the "Use It" undergraduate category that recognizes technology-based inventions to improve consumer devices. Their invention, "SignAloud," is a pair of gloves that can recognize hand gestures that correspond to words and phrases in American Sign Language. Each glove contains sensors that record hand position and movement and send data wirelessly via Bluetooth to a central computer. The computer looks at the gesture data through various sequential statistical regressions, similar to a neural network. If the data match a gesture, then the associated word or phrase is spoken through a speaker.

video archive of gorilla gestures and their meanings

Can't find the right word? You might want to start moving your hands. New research at the University of Alberta suggests that gesturing while you talk may improve your access to language. Dr. Elena Nicoladis and her research colleagues observed the hand gestures of bilingual children as they told the same story twice, first in one language and then the other.

Singing is a form of communication that uses language and adds a beat. There are countless people who advocate that the power of music helped them get through rough times because if helped them verbalize their emotions. Music and singing can evoke such strong feelings in humans. By contrast, gesturing also seems quite natural. After all, before we can convey our thoughts to other fluent speakers, we rely on gesturing. This article explores how singing and signing have influenced our speaking. Moreover, which one came first?!