Dutch Parliamentary Election Study 2017: A comparison of three different survey modes

Ever since 1971, the Dutch Parliamentary Election Study has been conducted using face-to-face interviews and a fresh probability sample. This report examined if and to what extent the representativeness and data quality of the DPES would be affected by a switch to web-based interviewing or by recruiting respondents from an ongoing internet panel. To this end, the three survey modes were compared on key indicators. For each indicator, it was determined if the results differed between the survey modes and, if so, which survey mode yielded the best data quality.