Sept. 20, 2018-The Dr. Richard Warshak study is likely the most significant and important analysis of the social science literature relating

The headnote reads:

Two central issues addressed in this article are the extent to which young children's time should be spent predominantly in the care of the same parent or divided more evenly between both parents, and whether children under the age of 4 should sleep in the same home every night or spend overnights in both parents' homes.

A broad consensus of accomplished researchers and practitioners agree that, in normal circumstances, the evidence supports shared residential arrangements for children under 4 years of age whose parents live apart from each other. Because of the well-documented vulnerability of father-child relationships among never-married and divorced parents, the studies that identify overnights as a protective factor associated with increased father commitment to child rearing and reduced incidence of father drop-out, and the absence of studies that demonstrate any net risk of overnights, policymakers and decision makers should recognize that depriving young children of overnights with their fathers could compromise the quality of developing father-child relationships.

Sufficient evidence does not exist to support postponing the introduction of regular and frequent involvement, including overnights, of both parents with their babies and toddlers. The theoretical and practical considerations favoring overnights for most young children are more compelling than concerns that overnights might jeopardize children's development.

Richard A. Warshak (2014), Social Science and Parenting Plans for Young Children: A Consensus Report, Psychology, Public Policy, and Law, Vol. 20, No. 1, p. 46