Abstract
Maternal emotion dysregulation (ED) plays a crucial role in the development of psychopathology in children. The current study aimed to investigate parenting stress as a mediator of the relationship between maternal emotion dysregulation and child startle potentiation, with child sex as a moderator. Mothers were interviewed to obtain self-report of maternal ED and parenting stress and child's dark-enhanced startle (DES) response was measured using electromyographic recordings of the eye-blink muscle during the delivery of acoustic probes. We found that maternal ED was positively correlated with both her parenting stress and her child's DES. A bootstrap analysis yielded a full mediation of the association between ED and child DES via parenting stress. Child sex was not a significant moderator of these relationships. These results suggest that maternal ED has important consequences for the intergenerational transmission of risk and also highlight the interaction of behavioral and biological mechanisms of risk.
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