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Questasy: Online Data Dissemination with DDI 3

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  1. Questasy A web application for online data dissemination based on DDI 3 Alerk Amin Marika Puumala

  2. Contents • Background & requirements • Solution: Questasy & DDI 3 • Demonstration

  3. Background • CentERdata • LISS panel • Online panel of ~8000 individuals • Free survey data & data collection • Diverse questionnaires each month (~30 mins in total) • Disseminate all data

  4. Diversity of Surveys • Various topics • Single wave studies • e.g. European Value Survey (partial) • Longitudinal studies • e.g. LISS Core Study • Varying data collection frequency

  5. Objectives for Data Dissemination • Previously • No dissemination tool or standard • Data delivered ‘ad hoc’ in SPSS files + Word codebooks • Goal • Disseminate all data collected in the panel via a website (www.lissdata.nl)

  6. Dissemination Requirements • Complete documentation in database • Studies, questions, variables, … • Longitudinal/multi-measure studies • Public and restricted access + administrator views • Advanced search • Multiple languages • Use an international standard -> DDI 3

  7. Solution: Questasy • Developed by CentERdata • Web application • Manage and distribute survey data and metadata

  8. Questasy Website Integration www.lissdata.nl /lissdata /dataarchive Static Web Pages (External) Researcher Interface (External) Administrator Interface (Internal) Database Questasy

  9. Questasy Implementation • PHP / MYSQL • MVC Architecture • Model based on DDI 3 • Search

  10. DDI 3 Relationships in Model

  11. DDI 3 in Database

  12. Search • Researcher interface • Sphinx search engine

  13. Demonstration • www.lissdata.nl

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