ArmstrongJ. S. (1975) Monetary incentives in mail surveys. Public Opinion Quarterly, 39, pp. 111–116.
2.
BrennanM. (1992) The effect of a monetary incentive on mail survey response rates: new data. Journal of the Market Research Society, 34, pp. 173–177.
3.
ChurchA. H. (1993) Estimating the effect of incentives on mail survey rates. A meta-analysis. Public Opinion Quarterly, 57, pp. 62–79.
4.
CouperM. P. (2000) Web surveys: a review of issues and approaches. Public Opinion Quarterly, 64, pp. 464–494.
5.
CouperM.P., TraugottM.W., & LamiasM.J. (2001) Web survey design and administration. Public Opinion Quarterly, 65, pp. 230–253.
6.
DeciE. L. (1971) The effects of externally mediated rewards on intrinsic motivation. Journal of Personality and Social Psychology, 18, pp. 105–115.
7.
EichnerK., & HabermehlW. (1982) Ergebnis einer empirischen Untersuchung zur Reprsentativitt postalischer Befragungen [Results of a study on the representativeness of mail surveys]. Klner Zeitschrift fr Soziologie und Sozialpsychologie, 34, pp. 93–116.
GritzA. S. (2002) Web-based Mood Induction. Unpublished Doctoral Dissertation, University of Erlangen-Nrnberg, Germany.
10.
GritzA. S. (2004a) Incentives in web surveys: methodological issues and a review. Manuscript submitted for publication, University of Erlangen-Nrnberg, Germany.
11.
GritzA. S. (2004b) The long term impact of material incentives on response quantity and quality in online access panels. Manuscript submitted for publication, University of Erlangen-Nrnberg, Germany.
12.
GritzA. S. (2004c) Recruitment for online access panels. International Journal of Market Research. Manuscript accepted for publication.
13.
GritzA.S., & MoserK. (2000) Reprsentativitt im Online-Panel [Representativeness in online panels]. Der Markt, 155, pp. 156–162.
14.
GritzA.S., ReinholdN., & BatinicB. (2002) ‘Online Panels’ in Online Social Sciences, ed. BatinicB., ReipsU., BosnjakM., & WernerA. pp. 27–47. Seattle: Hogrefe.
15.
GritzA.S., & SchumacherJ. (2000) The www as a research medium: an illustrative survey on paranormal belief. Perceptual and Motor Skills, 90, pp. 1195–206.
16.
HellwigJ.O., von HeesenB., & BouwmeesterR. (2003) Rekrutierungsunterschiede bei Online-Panels und ihre Folgen [Differences in recruitment with online panels and their consequences]. In Online-Marktforschung Beitrge aus Wissenschaft und Praxis, ed. TheobaldA., DreyerM., & StarsetzkiT., pp. 227–240. Wiesbaden: Gabler.
17.
HipplerH.-J. (1988) Methodische Aspekte schriftlicher Befragungen: Probleme und Forschungsperspektiven [Methodological aspects in mail surveys: Problems and perspectives]. Planung und Analyse, 6, pp. 244–248.
18.
JamesJ.M., & BolsteinR. (1990) The effect of monetary incentives and follow-up mailings on the response rate and response quality in mail surveys. Public Opinion Quarterly, 54, pp. 346–361.
19.
JamesJ.M., & BolsteinR. (1992) Large monetary incentives and their effect on mail survey response rates. Public Opinion Quarterly, 56, pp. 442–453.
20.
LinskyA. S. (1975) Stimulating responses to mailed questionnaires: a review. Public Opinion Quarterly, 39, pp. 82–101.
21.
McDanielS.W., & JacksonR.W. (1984) ‘Exploring the probabilistic incentive on mail survey research’. In Proceedings of the American Marketing Association Summer Educators' Conference, ed. BernhardtK., pp. 372–375. Chicago: AMA.
22.
Mller-PetersA., KernO., & GeilerH. (2001) Die Wirkungsweise unterschiedlicher Incentivierungssysteme auf Rekrutierungserfolg und Stichprobenqualitt [The effect of incentives on recruitment and sample quality]. Paper presented at the German Online Research conference, Gttingen, Germany.
23.
PorterS.R., & WhitcombM.E. (2003) The impact of lottery incentives on student survey response rates. Research in Higher Education, 44, pp. 389–407.
24.
SingerE., Van HoewykJ., GeblerN., RaghunathanT., & McGonagleK. (1999) The effect of incentives on response rates in interviewer-mediated surveys. Journal of Official Statistics, 15, pp. 217–230.
25.
ThomaM., & ZimmermannM. (1996) Zum Einflu der Befragungstechnik auf den Rcklauf bei schriftlichen Umfragen. Experimentelle Befunde zur ‘Total-Design-Methode’ [The influence of surveying technique on response rates in mail surveys: experimental results on the ‘Total-Design-method’], ZUMA-Nachrichten, 39, pp. 141–157.
26.
WeelsM., & ZimmermannM. (2001) Offline-rekrutierte Access-Panels als Knigsweg der panelbasierten Online-Forschung? [Are offline-recruited access panels the silver bullet of panel-based online research?]. Paper presented at the German Online Research conference, Gttingen, Germany.
27.
YuJ., & CooperH. (1983) A quantitative review of research design effects on response rates to questionnaires. Journal of Marketing Research, 20, pp. 36–44.