Exploring associations between maternal mental health and infant regulatory behaviors at 6 months in the home environment: Zooming in on maternal anxiety

Maternal mental health during the perinatal period has been linked to the development of infant emotion regulation capacity, largely through its impact on caregiver-infant interactions during the first year of life. The majority of studies have focused on the effects of maternal depression, even though maternal anxiety is more prevalent and its effects on infant outcomes are less well understood. The current study aims to 1) explore differences in infant affect and regulatory behaviors across two commonly implemented infant stress-induction paradigms and 2) evaluate the differential effects of depression and anxiety on infant regulatory behaviors. Six-month-old infants and their mothers (N = 126) completed two tasks remotely in the home: the Arm Restraint task and the Still-Face Paradigm. Maternal depression and anxiety symptoms were measured using the Edinburgh Postnatal Depression Scale (EPDS) subscales. Within-person results indicated no significant associations among infant regulatory behaviors nor infant reactivity across the two paradigms. Additionally, no significant associations were found between maternal mental health and infant regulatory behaviors during the Still-Face Paradigm. However, higher EPDS composite scores were associated with fewer infant avoidance behaviors during the Arm Restraint task, and this result was driven by items on the anxiety subscale. These findings suggest that infant regulatory behaviors may differ depending on task used and may also be influenced by subclinical levels of maternal anxiety, but not maternal depression.