Are you talking to me? Neural activations in 6-month-old infants in response to being addressed during natural interactions

Sarah Lloyd-Fox, Borbála Széplaki-Köllod, Jun Yin, G. Csibra

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Human interactions are guided by continuous communication among the parties involved, in which verbal communication plays a primary role. However, speech does not necessarily reveal to whom it is addressed, especially for young infants who are unable to decode its semantic content. To overcome such difficulty, adults often explicitly mark their communication as infant-directed. In the present study we investigated whether ostensive signals, which would disambiguate the infant as the addressee of a communicative act, would modulate the brain responses of 6-month-old infants to speech and gestures in an ecologically valid setting. In Experiment 1, we tested whether the gaze direction of the speaker modulates cortical responses to infant-direct speech. To provide a naturalistic environment, two infants and their parents participated at the same time. In Experiment 2, we tested whether a similar modulation of the cortical response would be obtained by varying the intonation (infant versus adult directed speech) of the speech during face-to-face communication, one on one. The results of both experiments indicated that only the combination of ostensive signals (infant directed speech and direct gaze) led to enhanced brain activation. This effect was indicated by responses localized in regions known to be involved in processing auditory and visual aspects of social communication. This study also demonstrated the potential of fNIRS as a tool for studying neural responses in naturalistic scenarios, and for simultaneous measurement of brain function in multiple participants.

Original languageEnglish
Pages (from-to)35-48
Number of pages14
JournalCortex
Volume70
DOIs
Publication statusPublished - Sep 1 2015

Fingerprint

Communication
Brain
Gestures
Interaction
Activation
Semantics
Parents
Experiment

Keywords

  • Communication
  • FNIRS
  • Infant-directed speech
  • Ostensive signals
  • Social interactions

ASJC Scopus subject areas

  • Clinical Neurology
  • Neurology
  • Arts and Humanities (miscellaneous)
  • Developmental and Educational Psychology

Cite this

Are you talking to me? Neural activations in 6-month-old infants in response to being addressed during natural interactions. / Lloyd-Fox, Sarah; Széplaki-Köllod, Borbála; Yin, Jun; Csibra, G.

In: Cortex, Vol. 70, 01.09.2015, p. 35-48.

Research output: Contribution to journalArticle

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