Primary researchers of this study are:
Ehmig, Simone C., Stiftung Lesen
Heymann, Lukas, Stiftung Lesen
Dataset: 1.0.0 (11.08.2016) doi:10.4232/1.12599
Access class: C - Data and documents are only released for academic research and teaching after the data depositor's written authorization. For this purpose the Data Archive obtains a written permission with specification of the user and the analysis intention.
More information is available at the data catalogue: study description.