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Add Health Codebook Explorer (ACE)

Welcome to the Add Health Codebook Explorer (ACE). This site allows you to view questions asked of respondents, parents, and interviewers during the In-School and In-Home interviews in Waves I through IV of The National Longitudinal Study of Adolescent to Adult Health.

You can browse by topic or search for questions by variable name, keyword, or phrase in order to discover the rich volume of data collected by Add Health. The questions are organized by topic, subtopic, and variable. Collections of variables were constructed specifically for this site to show similar questions asked across several waves of data collection and do not represent grouping for research purposes.  As noted above, the questions included in ACE are from the In-School and In-Home interviews.  There are many other datasets available; please visit our Restricted-Use Dataset Descriptions and Codebooks page for a complete list of available data, including contextual and biological data.  

Please refer to the ACE Instructions before searching and browsing, as following the instructions will ensure that you maximize your results. 

Click here to access the Add Health Codebook Explorer tool and begin browsing.