iva04, iva11, iva12, *iva13*: The interviewer was asked questions about the interview process or disturbances during the interview at the end of the last person interview in a household. The questions refer to the group of respondents interviewed by the interviewer that day. In some cases, however, interviewers had answered the same questions more than once. Since complete interviewer assessments may not be available until after the last individual interview, only this last information is retained. Exception to this rule: If there is more than one assessment for multiple households in a family on a given day, the information for each household is retained. As a result, the information is assigned to all persons in a family (or at the household level in exceptional cases) with the same interview date. Engstler, H., Groh, A., Klaus, D., Mahne, K., Spuling, S., Wetzel, M., Wolff, J., & Tesch-Roemer, C. (2015). German Ageing Survey (DEAS): Instruments of the Fifth Wave 2014. [URL link]