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How does cross-modal information influence category-selective responses to faces and birds in infants?

par Bourgaux, Laura ;Quek, Genevieve G.L.;De Heering, Adélaïde
Référence NeuroCog 2025 (17-18/11/2025: Brussels, Belgium)
Publication Non publié, 2025-11-17

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Résumé :

Faces hold a unique status in human perception, naturally capturing infants’ attention (Gliga et al., 2009). However, the role of attentional processes in shaping visual perception during early development remains unclear. Using a frequency-tagging approach combined with EEG (Quek & de Heering, 2024), this study investigates whether and how cross-modal cues modulate infants’ attention toward or away from distinct visual categories, including highly salient stimuli such as faces. To this end, 6- to 9-month-old infants viewed rapid streams of images flickering at 6 Hz (6 images/second), with faces and birds interlaced at distinct periodic intervals within each 30-second trial: a face every 5 images (i.e., 1.2 Hz); a bird every 4 images (i.e., 1.5 Hz). Each trial also contained neutral sounds, human voices or bird vocalizations presented at non-periodic intervals. Of key interest was whether this auditory information would modulate the strength of the face- and bird- selective signals. Preliminary results suggest that human voices may have served to suppress both category-selective responses, while bird vocalizations suppressed the face-selective response while enhancing the bird-selective response, but more power is needed.