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Dr Katie Slocombe and Dr Anne Schel, of the Department of Psychology at York, examined the degree of intentionality wild chimpanzees have over their alarm calls. The study shows that chimpanzees appear to produce certain alarm calls intentionally in a tactical and goal directed way--they are not simply fear-based reactions. In Uganda, the researchers presented wild chimpanzees with a moving snake model and monitored their vocal and behavioural responses. They found that the chimpanzees were more likely to produce alarm calls when close friends arrived in the vicinity. They looked at and monitored group members both before and during the production of calls and critically, they continued to call until all group members were safe from the predator. Together these behaviours indicate the calls are produced intentionally to warn others of the danger. Dr Slocombe said: "These behaviours indicate that these alarm calls were produced intentionally to warn others of danger and thus the study shows a key similarity in the mechanisms involved in the production of chimpanzee vocalisations and human language. "Our results demonstrate that certain vocalisations of our closest living relatives qualify as intentional signals, in a directly comparable way to many great ape gestures, indicating that language may have originated from a multimodal vocal-gestural communication system."

One significant concern that pilots have about cockpit auditory warnings is that the signals presently used lack a sense of priority. The relationship between auditory warning sound parameters and perceived urgency is, therefore, an important topic of enquiry in aviation psychology. The present investigation examined the relationship among subjective assessments of urgency, reaction time, and brainwave activity with three auditory warning signals. Subjects performed a tracking task involving automated and manual conditions, and were presented with auditory warnings having various levels of perceived and situational urgency. Subjective assessments revealed that subjects were able to rank warnings on an urgency scale, but rankings were altered after warnings were mapped to a situational urgency scale. Reaction times differed between automated and manual tracking task conditions, and physiological data showed attentional differences in response to perceived and situational warning urgency levels. This study shows that the use of physiological measures sensitive to attention and arousal, in conjunction with behavioural and subjective measures, may lead to the design of auditory warnings that produce a sense of urgency in an operator that matches the urgency of the situation.

Children aged four and younger who speak two languages or are learning a second have more rapid improvements in inhibitory control, a study by the University of Oregon has said. Inhibitory control is the ability to stop a hasty reflexive response in behaviour or decision-making and use higher control to react in a more adaptive way. "Inhibitory control and executive function are important skills for academic success and positive health outcomes and well-being later in life," said Atika Khurana, the study's co-author and a professor in the Department of Counselling Psychology and Human Services and scientist at the UO's Prevention Science Institute. "The development of inhibitory control occurs rapidly during the preschool years," she said. "Children with strong inhibitory control are better able to pay attention, follow instructions and take turns. "This study shows one way in which environmental influences can impact the development of inhibitory control during younger years."

Sound symbolism is a non-arbitrary relationship between speech sounds and meaning. We review evidence that, contrary to the traditional view in linguistics, sound symbolism is an important design feature of language, which affects online processing of language, and most importantly, language acquisition. We propose the sound symbolism bootstrapping hypothesis, claiming that (i) pre-verbal infants are sensitive to sound symbolism, due to a biologically endowed ability to map and integrate multi-modal input, (ii) sound symbolism helps infants gain referential insight for speech sounds, (iii) sound symbolism helps infants and toddlers associate speech sounds with their referents to establish a lexical representation and (iv) sound symbolism helps toddlers learn words by allowing them to focus on referents embedded in a complex scene, alleviating Quine's problem. We further explore the possibility that sound symbolism is deeply related to language evolution, drawing the parallel between historical development of language across generations and ontogenetic development within individuals. Finally, we suggest that sound symbolism bootstrapping is a part of a more general phenomenon of bootstrapping by means of iconic representations, drawing on similarities and close behavioural links between sound symbolism and speech-accompanying iconic gesture.

This article explains an experiment that was conducted, with the aim to find if people change the pitch of their voice when talking to different people. The experiment had participants to undergo a simulated job interview. The experiment found that people speak in a higher pitched voice when speaking to someone whom they believe is more dominant.