Adding fuel to the fire: How childhood and adolescent histories of interparental conflict amplify sleep problems during the transition to emerging adulthood.

This study followed 351 young people from childhood to emerging adulthood in the southeastern United States to understand how family conflict affects sleep. Researchers measured sleep using devices called actigraphs and asked participants about conflict between their parents at five different time points. Young people who experienced increasing parental conflict in childhood were more affected by parental conflict in adolescence, showing worse sleep quality as they entered adulthood.

Key points

• Among those with histories of increasing childhood interparental conflict, increases in adolescent interparental conflict predicted increases in sleep activity and long-wake episodes
• Childhood interparental conflict moderated the relationship between adolescent conflict and sleep efficiency
• Decreases in sleep efficiency were found from adolescence to emerging adulthood among those with cumulative conflict exposure
• Participants were followed longitudinally from age 8 to age 22 across five waves of data collection
• The pattern is consistent with stress sensitization theory, where prior stress exposure amplifies responses to subsequent stress

Limitations

The study is observational and cannot establish causation; while sleep was objectively measured with actigraphs, interparental conflict was based on participant reports which may not fully capture actual conflict levels.