Abstract
Recent extensions to life history theory posit that exposure to environmental unpredictability during childhood should forecast negative parental behaviors in adulthood. In the current research, this logic was extended to co-parental behaviors, which refer to how parents coordinate, share responsibility, and support each other’s parental efforts. The effects of early-life unpredictability on individual and dyadic co-parental functioning were examined in a sample of 109 families (two parents and their firstborn child) who were followed longitudinally from before the child’s birth until the age of two. Greater early-life unpredictability (family changes, residential changes, and parents’ occupational changes by age 8) experienced by mothers, but not fathers, predicted more negative co-parental behaviors in triadic observations 6 months post birth, and lower couple-reported co-parenting quality assessed 3, 9, 18, and 24 months post birth. These effects were not explained by parents’ childhood socioeconomic status or current relationship quality. These findings highlight the role of mothers in shaping co-parenting relationships and how these relationships might be influenced by mothers’ early-life experiences.
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