Observations of Mother-Twin Interactions at 9 Months: User's Manual for the Early Childhood Longitudinal Study, Birth Cohort (ECLS-B) 9-month Twin Triad Restricted-Use Data File

Nikki Aikens, Nana Kwakye, Amy Rathbun, Jennifer Park and Jodi Jacobson Chernoff

Mathematica Policy Research Reports from Mathematica Policy Research

Abstract: This user's manual describes the design, instrumentation, coding methodology, and special issues pertaining to the twin triad data file from the Early Childhood Longitudinal Study, Birth Cohort base year (9-month) data collection.

Keywords: Children's well-being; Early Childhood Education; Longitudinal studies; Parental Involvement in Education (search for similar items in EconPapers)
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