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Creator: Kooreman, P.
Title	Description
Weighing Project > Weighing Questionnaire > 2011 August	This is the eighth Weighing Questionnaire measurement, conducted in August 2011.
Weighing Project > Weighing Questionnaire > 2011 April	This is the fourth Weighing Questionnaire measurement, conducted in April 2011.
Weighing Project > Weighing Questionnaire	This questionnaire is presented to all participating households within the Weighing Project. The questionnaire is repeated every month.
Weighing Project	The Weighing Project follows developments in weight and lifestyle. The project consists of two parts: The Weighing Questionnaire and the Weighing Scale Data. The Weighing Questionnaire is presented monthly to selected households. For the Weighing Scale Data, CentERdata sent weighing scales to selected households. Depending on the experimental group, household members weigh themselves with a certain frequency, after which they can get a certain form of feedback about their measures. The data are automatically redirected to CentERdata and disseminated monthly.

Creator: Winkelmann, Rainer, Studer, Raphael, A.
Title	Description
Visual Analogue Scale and Item Response Time Measurement in Happiness Research > Part 2	This questionnaire examines the way people respond to the same question asked using different answering scales.Experimental design:In part 1 respondents were randomly assigned to a condition in which the answering type differed (discrete or ordinal).In part 2 the answering type that respondents got in part 1 was preloaded to assign them to the opposite condition (variable fl11a001).Respondents who got answering type 1 in part 1 got answering type 2 in part 2.Respondents who got answering type 2 in part 1 got answering type 1 in part 2.Respondents that didn’t participate in part 1 were assigned to a condition randomly in part 2.In part 2 a selection of respondents was presented “additional questions” at the end of the questionnaire, this as part of an internal project (variable fl11a003).
Visual Analogue Scale and Item Response Time Measurement in Happiness Research > Part 1	This questionnaire examines the way people respond to the same question asked using different answering scales.Experimental design:In part 1 respondents were randomly assigned to a condition in which the answering type differed (discrete or ordinal).In part 2 the answering type that respondents got in part 1 was preloaded to assign them to the opposite condition (variable fl11a001).Respondents who got answering type 1 in part 1 got answering type 2 in part 2.Respondents who got answering type 2 in part 1 got answering type 1 in part 2.Respondents that didn’t participate in part 1 were assigned to a condition randomly in part 2.In part 2 a selection of respondents was presented “additional questions” at the end of the questionnaire, this as part of an internal project (variable fl11a003).
Visual Analogue Scale and Item Response Time Measurement in Happiness Research	This questionnaire examines the way people respond to the same question asked using different answering scales.

Creator: Singer, Eleanor, Couper, Mick P.
Title	Description
Vignette Experiment on Paradata > Part 2	This study focuses on respondents’ views on the ethical issues relating to online data collection and paradata (data about the process of data collection, including browser characteristics, user metrics, keystroke files, time stamps, etc).
Vignette Experiment on Paradata > Part 1	This study focuses on general attitudes regarding privacy, confidentiality, and trust, and attitudes toward survey organizations.
Vignette Experiment on Paradata	This study consists of two measures. In July 2008, the LISS panel was presented a questionnaire on how the panel members feel about privacy in general, about the extent to which they feel that their privacy is violated by various organizations, and about their trust in research institutes. This questionnaire was fielded ahead of an experiment on the collection of paradata. In August 2008, the LISS panel was presented a questionnaire on the collection of paradata. The panel members were presented a fictitious invitation to participate in a study, after which they were asked to indicate the probability of their participation. Depending on the condition to which panel members were assigned, the type of research institute that issued the invitation, the topic of the study, and the extent to which the invitation mentioned the collection of so-called paradata (the recording of data pertaining to e.g. browser features, user's behavior, keystrokes, time indications, and so on) all varied.

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