Reips, Ulf-Dietrich https://orcid.org/0000-0002-1566-4745
Overlander, Annika T. https://orcid.org/0009-0006-8373-4086
Bannert, Matthias https://orcid.org/0000-0001-7901-9254
Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (RE 2655/3-1)
European Cooperation in Science and Technology (IS1004)
Universität Konstanz
Article History
Accepted: 2 June 2025
First Online: 18 July 2025
Declarations
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: Materials and all source code are available at .
: This research was first presented at the 4th conference of the European Survey Research Association (ESRA), July 18–22, 2011, Lausanne, Switzerland, in the symposium “Internet-based research: New horizons”, at the 44th annual meeting of the Society for Research in Psychology (SCiP), Long Beach, November 20, 2014, and at the 7th Webdatanet conference, Salamanca, Spain, May 27, 2015. The dropR package was also presented at the user! Conference in Salzburg, Austria, July 9, 2024. Correspondence concerning this article should be addressed to Ulf-Dietrich Reips, reips@uni-konstanz.de, University of Konstanz, Department of Psychology, Box 31, 78457 Konstanz, Germany.
: The authors have no competing interests to declare that are relevant to the content of this article.