Child diurnal cortisol differs based on profiles of maternal emotion socialization in high risk, low income, and racially diverse families.

Young children's physiological and emotional regulation depend on supportive caregiving, especially in the context of stress and adversity. Experiences of child maltreatment become biologically embedded by shaping stress physiology. Maternal emotion socialization may have an important influence on children's limbic-hypothalamic-pituitary-adrenal (LHPA) functioning. Grounded in theories of caregiver emotion socialization, a person-centered latent profile analysis was utilized to identify profiles of maternal emotion socialization among a high risk, low income, and racially diverse group of 248 mothers and their young children (Mage  = 4.39 years, SD = 1.10). The majority of the mothers (n = 165) had a history of involvement with the Department of Child Services for substantiated cases of child maltreatment. A latent profile analysis was conducted revealing three emotion socialization profiles: disengaged, engaged, and engaged + supportive. Emotion socialization profile differences in children's diurnal cortisol levels and slope (using area under the curve with respect to ground and increase, respectively) were examined. Children's diurnal cortisol levels were higher, and slopes were flatter, when mothers used more disengaged emotion socialization strategies. Mothers who neglected their children were more likely to fit the disengaged profile than the engaged profile. Implications for the socialization of regulation in children exposed to adversity are discussed.