Contributions
Contains data related to PTP survey. See Master Codebook and Item level codebook for more details.
Contains Item-level data for wave 2 related to the Q2 questionnaire responded by mothers. See Master Codebook for variable information.
This data is supplemental but non-essential to the main dataset. This contains race and ethnicity variables removed to preserve data integrity and data privacy.
This spreadsheet is meant to serve as a supplement to the master codebook, containing information on which measures were collected during each wave.
This contains a master codebook comprising of codebooks throughout the various waves of the entirety of the project. This additionally contains information on how to generally use twin data.
This dataset contains all longitudinal data for the entirety of the WRRMP. This includes 10 waves worth of twin data, with extensive reading, math, behavioral, and environmental measures.
The Western Reserve Reading and Math Project (WRRMP) is a NIH funded longitudinal study on child development. The project has collected data annually for 15 years, with data on approximately 450 twin pairs collected during this time.
