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This longitudinal study examined developmental trajectories of infant sleep problems from 3 to 24 months old and investigated associations with infant-parent attachment security and dependency. In a sample of 107 Israeli families, number and duration of infant nighttime awakenings were measured at 3, 6, 9, and 24 months old, using mothers' and fathers' reports on the Brief Infant Sleep Questionnaire (BISQ). Infant-parent attachment security and infant-parent dependency was assessed at 24 months old, using the observer Attachment Q-Sort procedure (AQS) with both parents. Latent growth curve models showed a non-linear decline in number and duration of infant nighttime awakenings over time. A higher number and longer duration of infant nighttime awakenings at 3 months were associated with higher infant-father attachment security at 24 months. In contrast, longer infant nighttime awakenings at 3 months were predictive of lower infant-mother attachment security at 24 months. A steeper decrease in duration of infant nighttime awakenings was associated with higher infant-father attachment security and lower infant-mother attachment security. As a potential mechanism, paternal involvement in nighttime caregiving was explored in relation to infant-father attachment security. Results of our post-hoc analyses revealed no significant associations between paternal involvement in nighttime caregiving and infant-father attachment security. Our results highlight the need to examine potential mechanisms explaining the divergent associations of infant sleep problems with infant-mother and infant-father attachment security in future research., (Copyright © 2021 The Authors. Published by Elsevier Inc. All rights reserved.)

Parental mentalizing-recognizing that children are separate psychological entities, who have their own thoughts, wishes, and intentions that motivate their behaviors-is traditionally considered a verbal, linguistic capacity. This paper aimed to examine the relation between parental verbal mentalizing (parental reflective function; PRF) and its nonverbal form-parental embodied mentalizing (PEM)-and how both constructs contribute to parents' subjective experience of parenting, namely parental stress and coparental alliance. 68 mothers and their three-months-old babies were observed to assess PEM, interviewed to code PRF, and completed self-reports of coparental alliance and parental stress. PEM was found to be positively correlated with PRF. Mediation analyses revealed that higher PEM, but not PRF, was associated with lower parental stress, mediated by positive reports of coparental alliance. The findings support adopting a multifaceted approach when studying parental mentalizing, both in terms of assessing parental mentalizing beyond its verbal expressions to include also embodied aspects, as well as investigating its impact beyond infant development to include the familial context within it operates. Conceptual, empirical and clinical implications are discussed., (Copyright © 2017 Elsevier Inc. All rights reserved.)