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Nearly 80% of children in the United States have at least 1 sibling, indicating that the birth of a baby sibling is a significant normative life event for most children and their parents. The transition to siblinghood is commonly discussed as traumatic for the older sibling, who may experience “displacement” or “dethronement”, but few studies have actually examined this normative transition. Most studies focus on the older child’s adjustment, yet it’s also the case that many older siblings enjoy their newborn sibling, and make active attempts to care for and engage the baby.

Since 2003, we have conducted a number of studies focusing on the transition to siblinghood. Read on to learn more about our studies, our results and how you can get involved!

Our Projects:

Family Transitions Study (FTS): Family Transitions Following the Birth of a Sibling

Hormones, Behavior and Parent-Infant Relationships Study (HBPIRS)

Family Transitions Study – 18 Months: The Development of Compassionate Behavior in Young Children

Family Transitions and Toddler Development (FTTD): A Within-Family Perspective

The Big Sib Study

The Baby Sib Study