At 12 months of age, we visited families at their homes, observed the mother–infant dyad for at least 90 min, and rated them on the Attachment Q-Sort [37 ]. Parents filled out a questionnaire on infants’ expressive language skills (ELFRA-2 [38 ]) when infants were 24 months old.
Mother-Infant Synchrony and Language Development
At 12 months of age, we visited families at their homes, observed the mother–infant dyad for at least 90 min, and rated them on the Attachment Q-Sort [37 ]. Parents filled out a questionnaire on infants’ expressive language skills (ELFRA-2 [38 ]) when infants were 24 months old.
Corresponding Organization : Italian Institute of Technology
Other organizations : Ludwig-Maximilians-Universität München
Variable analysis
- Condition (distal joint watching, proximal joint watching, free play)
- Interpersonal synchrony during free play
- Mothers' and infants' brain activity (measured using fNIRS)
- Mothers' and infants' behavior (micro-coded using ELAN)
- Dyads' electrocardiography (analyzed in separate papers)
- Infant seated in highchair (distal joint watching) or in mother's lap (proximal joint watching)
- Calm aquarium video watched for 90 seconds in joint watching conditions
- Order of distal and proximal joint watching conditions counterbalanced
- Free play condition always followed the two watching conditions
- No toys and no singing allowed during free play
- None specified
- None specified
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