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Direct linkZwaigenbaum, Lonnie; Bryson, Susan E.; Brian, Jessica; Smith, Isabel M.; Sacrey, Lori; Armstrong, Vickie; Roberts, Wendy; Szatmari, Peter; Garon, Nancy; Vaillancourt, Tracy; Roncadin, Caroline – Child Development, 2021
The objectives were to characterize behavioral signs of autism spectrum disorder (ASD) in younger siblings of diagnosed children (high-risk; HR) and examine classification features of the Autism Observation Scale for Infants (AOSI). Participants (501 HR and 180 low-risk [LR]) were assessed between 6 and 18 months using the AOSI and at age 3 for…
Descriptors: Autism, Pervasive Developmental Disorders, Symptoms (Individual Disorders), Infant Behavior
Peer reviewedSamuels, Helen R. – Child Development, 1980
When older siblings were present with infants and their mothers in the backyard of a private home, the infants went further from their mothers, traversed a larger area of the yard, left their mothers more quickly, and stayed away longer. (RH)
Descriptors: Infant Behavior, Infants, Influences, Mothers
Peer reviewedWishart, Jennifer G. – Child Development, 1986
Investigates whether 6- to 12-month-old infants' exposure to the successful search behavior of a sibling in two object-concept tasks would enhance infants' subsequent performance on these tasks. (HOD)
Descriptors: Child Development, Cognitive Ability, Cognitive Development, Cognitive Processes
Peer reviewedStewart, Robert B.; Marvin, Robert S. – Child Development, 1984
The behaviors of 57 mothers, their preschool-age children, and their infants were observed using a modified "strange situation" to explore the older siblings' potential to act as subsidiary attachment figures. Gamelike tasks were used to assess the conceptual perspective-taking abilities of the older children. (Author/RH)
Descriptors: Attachment Behavior, Child Caregivers, Infant Behavior, Infants
Peer reviewedDunn, Judy; Kendrick, Carol – Child Development, 1981
Individual differences in the social behavior of young siblings were studied in 40 sibling pairs observed at home, when the second child was 8 months old and 14 months old. Differences between same-sex and different-sex sibling pairs were marked by the second observation. More positive social behavior characterized same-sex pairs; more negative…
Descriptors: Age Differences, Family (Sociological Unit), Foreign Countries, Individual Differences
