Christopher Schatschneider is a full professor in the Department of Psychology at Florida State University and is an Associate Director of the Florida Center for Reading Research. His research interests include early reading development, research design, and statistics.

Contributions
This codebook contains information on the variables in the Wave 3 Parent Measures dataset. Original coding is provided, with alterations to coding for deidentification purposes annotated within the document.
This codebook contains information on the variables within the Wave 3 Child Survey Measures dataset. Original coding is provided, with alterations to coding for deidentification purposes annotated within the document.
This codebook contains information on the variables within the Wave 2 Child Survey Measures dataset. Original coding is provided, with alterations to coding for deidentification purposes annotated within the document.
This codebook contains information on the variables within the Wave 1 Child Survey Measures dataset. Original coding is provided, with alterations to coding for deidentification purposes annotated within the document.
This codebook contains information on the variables within the Wave 2 Parent Survey Measures dataset. Original coding is provided, with alterations to coding for deidentification purposes annotated within the document.
This codebook contains information on the variables within the Wave 1 Parent Measures . Original coding is provided, with alterations to coding for deidentification purposes annotated within the document.
This dataset contains results from the wave 3 survey completed by the twins who were 9 and older about themselves, administered in 2016.
This dataset contains results from the wave 2 survey completed by the twins who were 9 and older about themselves, administered in 2014.
This dataset contains results from the wave 2 survey completed by the twins who were 9 and older about themselves, administered in 2012.
This dataset contains results from the third wave of surveys sent to parents of twin pairs in 2016.