D80+ Documentation
The following documentation materials are available for the D80+ Survey:
- The complete Survey Instruments: written questionnaire, CATI instruments for Module 1 and Module 2 (also available in German)
- The Codebook: includes all variables contained in the Scientific Use File, their values and labels, as well as the frequencies of valid and missing responses (available in German only)
- The Methodological Report: explains the sampling procedure, survey implementation, and data collection (available in German only)
- Documentation of the generated and used instruments and variables: describes the procedures used for the construction of scores, scales, and generated variables (also available in German)
To support the use of the D80+ data, we have prepared a User Manual containing important information on the sample, weighting, data preparation, and the complex survey design. We strongly recommend this guide to all users as a helpful companion. It is also available in German.