Isabelle Dautriche’s scientific contributions

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Publications (1)

FIGURE 1 | Schematic representation of the various steps to code forms, types, and meaning functions of gestures defined in 12-to 15-months old infants.
FIGURE 2 | Classification of the 24 gesture forms shared among half of the study group (83% of all the gesture tokens) into the four possible gesture types. The number of flows connecting a gesture form node on the left to the gesture type node on the right corresponds to the number of types each form was assigned to. Gesture forms "Point" and "Wide open mouth" are highlighted as examples that have been illustrated in the text.
FIGURE 3 | Classification of the 24 gesture forms shared among half of the study group (83% of all the gesture tokens) into the eleven semantic functions identified, and their corresponding five pragmatic functions. The number of flows connecting a gesture form node on the left to the semantic and pragmatic function nodes in the middle and on the right correspond to the number of functions each form was assigned to. Gesture forms "Point" is highlighted as an example that has been illustrated in the text.
FIGURE 4 | Mean percentage of non-referential, deictic, iconic, and conventional gestures in the infant gesture repertoire (n = 6). The error bars represent standard errors of the mean. Each shape corresponds to one infant.
FIGURE 5 | Percentage of (a) semantic functions of (b) pragmatic functions of deictic, iconic, non-referential and conventional gesture types in 12-to 15-month-old infants.
Forms and functions of pre-speech gestures in 12- to 15-months old infants
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March 2024

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Isabelle Dautriche

Speech and co-speech gestures always go hand in hand. Whether we find the precursors of these co-speech gestures in infants before they master their native language still remains an open question. Except for deictic gestures, there is little agreement on the existence of iconic, non-referential and symbolic gestures before children start producing their first words. Here, we bridge this knowledge gap by leveraging an ethological method already established for describing speech independent gestures in nonhuman primates, to analyse the spontaneous gestures produced by infants when interacting with their caregivers. We manually annotated video recordings of infant-caregiver interactions (26h) from the CHILDES platform, to describe the gesture forms, types and functions in six infants from 12 to 15 months of age. We describe 62 gesture forms in the pre-speech repertoire. These were categorised into deictic, iconic, non-referential and symbolic gesture types, similar to co-speech gesture types. We also find that the type-function relation of pre-speech gestures map similarly to type-meaning relation of co-speech gestures. Taken together, our results illustrate linguistic properties of infant gestures in the absence of speech, suggesting them to be precursors of co-speech gestures.

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