We tested 6.5m and 9.5m olds in an EEG and gaze bias experiment where adults followed or did not follow the infant's gaze.
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We found greater alpha event-related desynchronization in right central and parietal electrodes when an adult followed the infant's gaze (congruent) compared to when another adult looked in the opposite direction (incongruent). This effect was stronger at 9.5m than at 6.5m.pic.twitter.com/jGa6F2cAUI
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No differences were found between congruent and incongruent versions of a scrambled control condition with an unrecognizable face, but the same level of coherent motion as the main conditions.pic.twitter.com/WzUMdqlZxQ
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For each infant, the identity of the congruent/incongruent actor was constant throughout the EEG experiment. In the gaze bias task, we found that 9.5m infants looked more at the congruent actor, whilst 6.5m infants showed no bias.pic.twitter.com/PCcmEP7oQM
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Importantly, 9.5m infants' gaze bias towards the congruent actor was related to their level of alpha ERD. Infants are therefore sensitive to someone following their gaze from 6.5m, but important neural and behavioural developments occur between this age and 9.5 months.
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