Evaluating mode differences in longitudinal data. Moving to a mixed mode paradigm of survey methodology -PhD thesis-
[…] a special type of survey that applies questionnaires repeatedly to the same respondents. In this PhD I investigate if and how collecting information using different modes can impact data quality in panel studies. Chapters 2 and 3 investigate how a sequential telephone – face-to-face mixed mode design can bias reliability, validity and estimates of […]