Variance Reduction Using Nonlinear Controls and Transformations

Nonlinear regression-adjusted control variables are investigated for improving variance reduction in statistical and system simulations. To this end, simple control variables are piecewise sectioned and then transformed using linear and nonlinear transformations. Optimal parameters of these transformations are selected using linear or nonlinear least-squares regression algorithms. As an example, piecewise power-transformed variables are used in the estimation of the mean for the twovariable Anderson-Darling goodness-of-fit statistic W ₂ ². Substantial variance reduction over straightforward controls is obtained. These parametric transformations are compared against optimal, additive nonparametric transformations obtained by using the ACE algorithm and are shown, in comparison to the results from ACE, to be nearly optimal.     

Co-parenting and parenting behaviour: The role of parent mental health for mothers and fathers in the postnatal period

The relationship between co-parenting, parent mental health and parenting remains unclear for parents during the postnatal period, particularly fathers. Therefore, the aim of the current study was to investigate these relationships for families in the postnatal period. Routinely collected self-report data from 138 mothers and 138 fathers participating in Family Foundations, a co-parenting intervention facilitated by a community health service in Melbourne, were used. Path analysis revealed that for mothers, more supportive co-parenting was associated with fewer mental health difficulties and, in turn, low parenting hostility and high parenting warmth. For fathers, supportive co-parenting was associated with fewer mental health difficulties, which was associated with low parenting hostility but not parenting warmth. Co-parenting was also directly associated with parenting warmth and hostility for fathers. The findings highlighted some key differences between mothers and fathers and the importance of interventions targeting the co-parenting relationship during early childhood.     

Experiences of child welfare social workers in addressing substance use among maltreated young mothers to prevent child maltreatment

Substance use during the perinatal period and while parenting can pose a significant risk to children's safety and well-being. Mothers who have experienced child maltreatment are more likely to use substances than mothers without a history of maltreatment. This study explores how child welfare social workers experience supporting young, maltreated mothers struggling with substance use to prevent the intergenerational transmission of child maltreatment. Semi-structured in-depth interviews were conducted with four social workers working with young mothers with a history of maltreatment and substance use. Interpretative Phenomenological Analysis revealed two themes: (1) grappling with system challenges and (2) supporting strategies for disrupting intergenerational transmission of child maltreatment. The results highlight the need for systemic changes around support for social workers who work with young mothers who use substances and have a history of maltreatment, and substance use treatment and mental health programs themselves. Mothers need access to prenatal programs that are trauma-informed, non-judgemental and that support participants' basic needs and parenting skills.     

Connecting and engaging with health and social care: Exploring the core components of a telephone and web-mediated family navigation prevention service

Early engagement with health care, mental health care, and social services can promote the well-being of children and families. How practitioners can best support family engagement with these services however remains largely unknown. To address this gap in knowledge, data from a voluntary 12-week telephone and web-mediated family navigation preventive intervention called Navigate Your Way were subject to mixed-methods analysis. Twenty-nine caregivers and five family navigators contributed data to the study. Thematic analysis of weekly navigator check-ins, participant closing interviews, navigator discharge notes, and lab meeting notes was conducted and followed by quantitative analysis of navigator effort across project activities. Results were then mixed to illuminate the essential conditions for supporting family connection to health care, mental health care, and social services. Qualitative analysis identified themes related to empathic engagement and person-centred navigation as central to connecting families to needed services. Quantitative analysis of navigator effort identified participant outreach, weekly check-ins, service identification, and ongoing supervision as essential navigation activities. Together, providing an environment that is supportive, consistent, flexible, person-centred and tailored to families' specific needs are important for connecting to health and social care.