Overnight care for young children: What the social science says about parenting arrangements

When parents of a very young child separate, one of the first practical questions they face is how much time the child should spend overnight with the parent they do not primarily live with. For infants and toddlers, this deceptively simple question has become one of the most debated topics in family law and developmental psychology. The available research does not offer a single, tidy answer, but it does provide a useful framework for thinking carefully about what a young child needs.

The attachment framework

Much of the discussion is grounded in attachment theory, associated with the work of John Bowlby. In plain terms, a securely attached infant uses their primary caregiver as a “secure base”, a person from whom they venture out to explore the world, and to whom they return for comfort when distressed. A strong, secure attachment in the earliest years is understood to underpin a child’s later ability to regulate emotions and to form healthy relationships. Where that early attachment is disrupted, poorer emotional and behavioural outcomes are associated, sometimes persisting into adulthood.

Attachment is generally understood to be developmentally more important for children under about three years of age than for older children. Because very young children cannot regulate their own emotions and rely on the primary attachment figure to help them do so, even a relatively brief separation within those first years of their life may have implications for a child’s wellbeing later. This is the concern that sits behind cautious approaches to overnight care for the youngest children.

What the Australian research found

The most influential Australian study in this area was conducted by Jennifer McIntosh, Bruce Smyth and Margaret Kelaher. Reported to government in 2010 and published in 2013, it drew on the nationally representative Longitudinal Study of Australian Children.

The study found that infants aged 0 to 2 who spent at least one overnight per week with the non-resident parent showed increased irritability and less monitoring of their primary carer than children who had daytime-only contact. Children aged 2 to 3 who spent a high proportion of overnight time with the non-resident parent showed lower persistence in play. No such effect was found for children aged four to five.

These particular behaviours, irritability, altered monitoring of the primary carer, and low persistence, were chosen because they are regarded as markers linked to attachment security.

Importantly, the authors themselves cautioned that these are population-level associations. They describe patterns across groups of children; they are not predictions about how any individual child will fare.

Similar associations have been reported overseas. In a longitudinal attachment study, Solomon and George (1999) found that, at age 3, children with more than weekly overnights with the non-resident parent displayed increased anxiety, anger and agitation, along with higher rates of insecure and disorganised attachment to their primary caregiver.

Later work by Tornello and colleagues (2013), using data from the United States Fragile Families study, found higher attachment insecurity among 1-year-olds who spent at least 1 night per week with the non-resident parent, and among three-year-olds who spent at least 35 per cent of overnights away from their primary carer.

This is contested, not settled science

It would be misleading to present this research as the final word. The field is genuinely divided, and the studies described above have attracted robust criticism.

Methodological critiques, notably from Cashmore and Parkinson, point out that some of this research relies heavily on reports from the primary carer, works with small subsamples of children in frequent overnight care, and does not capture the quality of the child’s relationship with the non-resident parent before separation. Others take a markedly different view. The “consensus report” prepared by Richard Warshak in 2014, endorsed by a large number of specialists, argues against restricting overnights and encourages shared parenting, including overnights, for young children. Lamb and Kelly have expressed a similar view, contending that most children over the age of two can tolerate consecutive overnights.

The closest thing to common ground comes from the integrative work of McIntosh, Pruett and Kelly (2014), a collaboration across the divide. Their guidelines place safety first. They do not support blanket cautions against overnight care during the first 3 years; rather, they counsel caution about frequent overnight schedules for the youngest children, and support some overnights where certain conditions are met: a meaningful pre-separation relationship with each parent, a cooperative co-parenting relationship, the presence of older siblings, and a child’s individual temperament. High conflict between the parents is identified as a key aggravating factor that counsels caution about frequent transitions.

In particular:

“Although researchers in the early child mental health field recognise the formative years as spanning pre-birth to the fifth year, a ‘0-3 years’ definition is commonly used to connote the years of greatest vulnerability in Family Law and mental health literature.” and a “both/and” perspective on early attachment formation and joint parental involvement is warranted. The young child needs early, organised caregiving from at least one, and most advantageously, more than one available caregiver” (Marsha Kline Pruett, Jennifer E McIntosh, and Joan B Kelly, ‘Parental separation and Overnight Care of Young Children’, Part 1: Consensus Through Theoretical and Empirical Integration’ (2014) 52(2) Family Court Review 241-256).

The Law

In parenting matters, the court must treat the child’s best interests as the paramount consideration (Section 60CA of the Family Law Act). Section 60CC directs attention to factors relevant to parenting arrangements, including:

1. What arrangements will promote safety [Section 60CC(2)(a)]
2. Any views expressed by the child [Section 60CC(2)(b)]
3. The child’s developmental, psychological, emotional and cultural needs [Section 60CC(2)(c)]
4. The capacity of each person with parental responsibility to provide for the child’s needs [Section 60CC(2)(d)]
5. The benefit to the child of being able to have a relationship with parents, and other significant people, where it is safe to do so [Section 60CC(2)(e)]
6. Anything else that is relevant to the child [Section 60CC(2)(f)]

In practice, that means there is no automatic rule about overnight time for very young children. The court looks at the individual child, the parents’ capacity to meet the child’s needs, the practical arrangement proposed, and whether the arrangement promotes the child’s wellbeing and security.

Practical takeaways

Read together, the research supports a cautious, individualised approach rather than a blanket rule. A few themes emerge that separated parents may find helpful to keep in mind:

• The evidence favours careful, case-by-case assessment over rigid formulas; what suits one child may not suit another.
• A graduated introduction of overnights over time is commonly favoured, particularly for the youngest children.
• The frequency of transitions matters; multiple separate changeovers may raise different concerns than fewer, longer periods.
• Where parents cannot agree, an assessment by a qualified expert is the appropriate way to inform arrangements.

Parenting/children’s matters are a delicate area of family law where the benefit of early and comprehensive advice cannot be overstated.  If you have a Family Law matter involving children and require advice, please contact our office on (02) 4944 3322 to make an appointment with our Accredited Specialist in Family Law, Hayden Carr.

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