1. Covering the general population by Internet interviewing Marcel Das 17-9-2015 1

2. MESS Project core element: LISS panel other key elements: - core study - experimental modules - new forms of data collection - links with administrative data - special groups 17-9-2015 2

3. Core element: LISS panel  Online panel of 5,000 households  8,000 individuals (>= 16 years)  Questionnaires each month, 30 min.  Incentive 15 euro an hour (average)  For scientific use, at no cost 17-9-2015 3

4. LISS panel  Online interviews as method, but:  Probability sample drawn from address sampling frame of Statistics Netherlands  Includes households without Internet access (less than 15%): CentERdata provides equipment  Contacted by letter, telephone or visit 17-9-2015 4

5. simPC Very small and silent Only the most frequently used functions Automatic maintenance, safety Simple operation and readable screens Installation and support 17-9-2015 5

6. 6 Internet interviews letter and brochure short interview simPC and adsl households with Internet households without Internet confirmation panel question Recruitment

7. 17-9-2015 7 Internet interviews letter and brochure short interview simPC and adsl confirmation panel question Primary response target: 80% Secondary response target: 60% Tertiary response target: 53% Response

8. Recruitment experiment 17-9-2015 8 CATI = Computer Assisted Telephone Interviewing CAPI = Computer Assisted Personal Interviewing

9. Set up main recruitment Combination CATI – CAPI, follow up CAPI Prepaid 10 euro incentive Promised extra 10 euro incentive for starting Attention to design letter and brochure 17-9-2015 9

10. Results 17-9-2015 10

11. Non-response patterns Similar to those of other leading scientific panels Superior to commercial access and volunteer panels: - no coverage problems - no selfselection 17-9-2015 11

12. Attention for difficult groups  Correction by oversampling in refreshment of 2009 (with Statistics Netherlands)  New immigrant panel (with Cross-cultural Psychology, Tilburg University and Statistics Netherlands) 17-9-2015 12

13. Correction of bias by stratified refreshment sample 2009 17-9-2015 13 Group Population 2007 % April 2008 Bias April 2009 Bias Jan 2010 Bias Age >=7011.6-5.4 -2.8 Living alone19.2-5.4-5.0-2.4 Non-western immigrant 9.6-5.1-4.8-3.7 Persons

14. New forms of data collection 17-9-2015 14

15. Use of graphical or animated presentation 17-9-2015 15

16. Biomarkers pilot study: blood cholesterol, saliva cortisol, and waist circumference 17-9-2015 16

17. More biomarker experiments... -accelerometers -advanced scales (based on bioelectrical impedance) link objective data with self-report data high frequency measurement 17-9-2015 17

18. Use of the LISS panel 17-9-2015 18

19. Questionnaires  The “household box”  Experimental modules open to academic researchers at no cost  Core study 17-9-2015 19

20. Experimental modules  Who can use the LISS panel: every researcher who wants to collect data for scientific, policy or societal relevant research Scientific research: Academic researchers, irrespective of nationality, can use the LISS panel at no cost  Proposals can be submitted throughout the year 17-9-2015 20

21. Proposals: Summary (May 2010) 17-9-2015 21 Decision Board of OverseersCount Undecided (in review or revision) 14 Accepted49 Rejected 10 Total73

22. Proposals: Examples 17-9-2015 22

23. Available data  Who can use the LISS data: every researcher who wants to use data for scientific, policy or societal relevant research  Use of data is free of charge (unless data are used for research funded by means of external sources)  Available data:  longitudinal core study  proposed studies 17-9-2015 23

24. Longitudinal core study  Household and family  Economic situation and housing  Work and schooling  Social integration and leisure  Health  Personality  Religion and ethnicity  Politics and values 17-9-2015 24

25. LISS data  Disseminated through website / data archive: http://www.lissdata.nl  Database is based on an internationally used specification for describing social science data (DDI): one of the first implementations of DDI version 3  Search entry with keyword and on concept, topic, and study (relational)  Exchangeable with other data archives 17-9-2015 25

27. October 2010 Publisher: Routledge / Taylor & Francis Group 17-9-2015 27