A study of infants living in ten US communities in 1991, it follows these children from birth through fifth grade focusing on parental and non-parental care and social and cognitive development.
See Early Childhood Longitudinal Studies (ECLS), Longitudinal studies, National Child Development Study (NCDS), National Educational Longitudinal Surveys (NELS), National Longitudinal Study of Adolescent Health (AddHealth), National Longitudinal Survey of Children and Youth (NLSCY), National Longitudinal Survey of Youth (NLSY), New York Longitudinal Study (NYLS)