Summary: A new study of five languages reveals phoneme emotion associations are stronger at the beginning or words, allowing the emotional content to be understood before the entire word is spoken.
Source: Bocconi University.
Individual speech sounds – phonemes – are statistically associated with negative or positive emotions in several languages, new research published in the journal Cognition by Bocconi Professor Zachary Estes, his Warwick colleague James Adelman and Bocconi student Martina Cossu shows. These associations help us quickly avoid dangers, because the phoneme-emotion associations are strongest at the beginning of the word and the phonemes that are spoken fastest tend to have a negative association.
It has long been known that phonemes systematically convey a range of physical properties such as size and shape. For example, the ‘e’ sound in Beetle sounds small, whereas the ‘u’ sound in Hummer sounds big. This is known as sound symbolism.
Given the evolutionary importance of avoiding dangers and approaching rewards, Estes and colleagues hypothesized that, like size and shape, emotion should also have sound symbolic associations. They tested this prediction in five languages – English, Spanish, Dutch, German and Polish – and in all five languages particular phonemes did indeed occur more often in positive or negative words.
Estes and colleagues also tested whether this emotional sound symbolism could be an adaptation for survival. To aid survival, communication about opportunities and especially dangers needs to be fast. The researchers tested this assumption in two ways.
First, they showed that in all five languages the phoneme-emotion associations are stronger at the beginnings of words than at the middle or ends of words. This allows emotion to be understood fast, even before the whole word is spoken.
Second, they examined the speed with which specific phonemes can be spoken. Estes and colleagues discovered that phonemes that can be spoken faster are more common in negative words. This allows dangers to be understood faster than opportunities, and this aids survival because avoiding dangers is more urgent than winning rewards. For instance, being too slow to avoid a snake can be fatal, but if you’re too slow to catch a bird, you will probably have other chances.
Estes and his colleagues argue that emotional sound symbolism evolved due to its adaptive value to humans: it made communication about dangers and opportunities more efficient, allowing a quicker reaction to vital objects and thereby supporting the fitness and survival of the human species.
First author James Adelman said “In debates about whether human language abilities evolved from more general cognitive skills or more specific communicative adaptations, these findings reveal one specific adaptation. Our findings suggest that the ability to appreciate very short speech sounds could have helped humans to efficiently warn kin and peers, aiding survival.”
Zachary Estes added “We have also begun testing applications in business, because emotional phonemes provide an opportunity for companies to inform consumers about their products. For example, a pharmaceutical company might want to use positive sounds for a drug that promotes health benefits like a vitamin, but they might want to use negative sounds for a drug the prevents health detriments like an anti-malarial drug.”
Source: Zachary Estes – Bocconi University
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Original Research: Abstract for “Emotional sound symbolism: Languages rapidly signal valence via phonemes” by James S. Adelman, Zachary Estes, and Martina Cossu in Cognition. Published March 16 2018
Emotional sound symbolism: Languages rapidly signal valence via phonemes
Rapidly communicating the emotional valence of stimuli (i.e., negativity or positivity) is vital for averting dangers and acquiring rewards. We therefore hypothesized that human languages signal emotions via individual phonemes (emotional sound symbolism), and more specifically that the phonemes at the beginning of the word signal its valence, as this would maximize the receiver’s time to respond adaptively. Analyzing approximately 37,000 words across five different languages (English, Spanish, Dutch, German, and Polish), we found emotional sound symbolism in all five languages, and within each language the first phoneme of a word predicted its valence better than subsequent phonemes. Moreover, given that averting danger is more urgent than acquiring rewards, we further hypothesized and demonstrated that phonemes that are uttered most rapidly tend to convey negativity rather than positivity. Thus, emotional sound symbolism is an adaptation providing an early warning system in human languages, analogous to other species’ alarm calls.