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
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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

Published: Jun 21, 2007
Publisher: National Center for Education Statistics
Human Services Early Childhood
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Authors

Nikki Aikens

Nana Kwakye

Amy Rathbun

Jennifer Park

Jodi Jacobson Chernoff

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. Also included is information to help users access and use the twin triad data file in conjunction with the main ECLS-B restricted-use data files.

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