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In October 2010, the LISS panel was presented with two questionnaires about conditional sentences. In one survey (the correlation survey, part 2), the correlation between penal attitudes and knowledge of conditional sentences was measured on the one hand and attitudes towards conditional sentences on the other. In the second survey (the experimental survey, part 1), participants were given information (short descriptions) about conditional sentences to measure the influence of this information (and hence knowledge) on attitudes while also taking into consideration the general penal attitude of participants. Four distinct groups were differentiated: group 1 received additional information on the effectiveness of conditional sentences, group 2 received additional information on the nature of the conditional sentences, group 3 received additional information on both the nature and effectiveness of the conditional sentences while, finally, group 4 received no additional information (control condition).

In September 2012 the questionnaire “Dutch Parliamentary Election Studies 2012”, (based on the NKO) was administered to the LISS panel members aged 18 years and older. (Part of the questionnaire also was presented to the panel members aged 16 or 17, if the questions were applicable.) Because of the elections that have been held on September 12, the questionnaire was presented on September 13.

This questionnaire concerns the political preference of Dutch respondents.

In May 2011 the LISS panel completed a questionnaire about voluntary activities and/or participation in activities within organizations. The questions presented to respondents were dependent on the total number of organizations that they had entered in the Social Integration and Leisure questionnaire (Wave 4). The structure of the questionnaire is explained extensively in the introduction of the codebook.

In this study the main
aim is to understand socioeconomic differences in one important aspect of
health behavior, namely food choice. A Discrete Choice Experiment is used,
where respondents are presented with a number of choice sets, each of which
contains two alternatives between which the respondents have to choose.

A Discrete Choice
Experiment is used in part 1, where respondents are presented with a number of
choice sets, each of which contains two alternatives between which the
respondents have to choose. In the second part, additional questions are asked
to measure health knowledge and health valuation of the respondents.