1. Beatty P.C., Willis G.B.: Research synthesis: the practice of cognitive interviewing. Public Opin. Quart. 71, 287–311 (2007)
2. Behr, D., Kaczmirek, L., Bandilla, W., Braun, M.: Asking probing questions in web surveys: which factors have an impact on the quality of responses? Soc. Sci. Comput. Rev. (2012). doi: 10.1177/0894439311435305
3. Behr, D., Braun, M., Kaczmirek, L., Bandilla, W.: Testing the validity of gender ideology items by implementing probing questions in web surveys. Field Methods (Forthcoming)
4. Bolzendahl, C., Coffe, H.: A gender gap in citizenship norms? The importance of political, civil and social rights and responsibilities. Br. J. Sociol. 60(4), 763–791. http://escholarship.org/uc/item/71x598x2 (2008). Accessed 24 April 2012
5. Childs J., Goerman P.: Bilingual questionnaire evaluation and development through mixed pretesting methods: the case of the U.S. census nonresponse followup instrument. J. Off. Stat. 26, 535–557 (2010)