RT Book T1 Improving interview method and questionnaire design: response effects to threatening questions in survey research T2 NORC series in social research T2 Jossey-Bass social and behavioral science series A1 Bradburn, Norman M. 1933- A1 Sudman, Seymour 1928-2000 LA English PP San Francisco, Calif. PB Jossey-Bass YR 1980 ED 2. print. UL https://krimdok.uni-tuebingen.de/Record/1609447409 SN 087589402X K1 Methodologie K1 Intervention K1 Fragebogen K1 Gültigkeit K1 Demoskopie : Methode