In:How the Brain Got Language – Towards a New Road Map:
Edited by Michael A. Arbib
[Benjamins Current Topics 112] 2020
► pp. 121–135
Mind the gap – moving beyond the dichotomy between intentional gestures and emotional facial and vocal signals of nonhuman primates
Published online: 11 August 2020
https://doi.org/10.1075/bct.112.09lie
https://doi.org/10.1075/bct.112.09lie
Abstract
Despite the variety of theories suggesting how human language might have evolved, very few consider the potential role of
emotions in such scenarios. The few existing theories jointly highlight that gaining control over the production of emotional
communication was crucial for establishing and maintaining larger social groups. This in turn resulted in the development of
more complex social emotions and the corresponding sophisticated socio-cognitive skills to understand others’ communicative
behavior, providing the grounds for language to emerge. Importantly, these theories propose that the ability of controlling
emotional communication is a uniquely human trait, an assumption that we will challenge. By taking a comparative approach, we
discuss recent findings from behavioral and neurobiological studies from our closest relatives, the non-human primates, on the
extent of control over their gestural, facial and vocal signals. This demonstrates that research foci differ drastically
across these modalities, which further enhances the traditional dichotomy between emotional, involuntary facial and vocal
expressions in contrast to intentionally, voluntarily produced gestures. Based on this brief overview, we point to gaps of
knowledge in primate communication research and suggest how investigating emotional expressions in our closest relatives might
enrich the road map towards the evolution of human language.
Article outline
- Background
- Scenarios of language evolution and the role of emotions
- Comparative approaches to language evolution
- Emotional and intentional communication in nonhuman primates
- Facial expressions
- Vocalizations
- Gestures
- How can comparative research on emotions contribute to theories of language evolution?
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