14-11-2018 Questasy: Documenting and Disseminating Longitudinal Data Online with DDI 3 Edwin de Vet 11/14/2018

CentERdata Research institute Data collection Quantitative Analysis 14-11-2018 CentERdata Research institute University of Tilburg, Netherlands Data collection Manage several panels Quantitative Analysis Software solutions 11/14/2018

LISS Panel ~6000 households in Netherlands 14-11-2018 LISS Panel ~6000 households in Netherlands Studies conducted on various schedules Includes longitudinal studies Datasets prepared on various schedules 11/14/2018

Questasy Web application based on DDI 3 Manages data & metadata 14-11-2018 Questasy Web application based on DDI 3 Manages data & metadata Written in CakePHP (MySQL) Theming Sphinx search engine http://www.lissdata.nl/dataarchive/ 11/14/2018

Features Public Researcher Administrator Browse studies, questions, variables, publications, concepts, topics, codebooks Researcher Download datasets, create custom datasets (basket) Administrator Enter and edit metadata & data, upload of files 11/14/2018

DDI - Questasy Study Unit Conceptual Component Concept Scheme Concept 14-11-2018 DDI - Questasy Study Unit Conceptual Component Concept Scheme Concept Data Collection Collection Event Question Scheme Question Item Construct Scheme Question Construct Logical Product Category Scheme Category Code Scheme Code Variable Scheme Variable Phys. Data Product Physical Instance 11/14/2018

Questasy 5.0 – New features Questions: multilingual DDI 3.1 import 11/14/2018

Multilingual – Up to version 4.3 Tables for questions and categories contain two fields for languages LISS data: two languages (English – Dutch) SCP data: one language (English) 11/14/2018

Overview Questionnaire 11/14/2018

Question View – LISS data 11/14/2018

Question View – SCP data 11/14/2018

SHARE project Survey of Health, Ageing and Retirement in Europe Face-to-face interviews Interviews programmed in Blaise Interviews translated into various European languages (> 20) 11/14/2018

Multilingual New tables for question texts (and category texts) Configurable Backwards compatible Question Item Question Text text Lang 5.0 Question Item text1 text2 Up to 4.3 11/14/2018

Questionnaire Overview 11/14/2018

Questionnaire Overview 11/14/2018

Single question view 11/14/2018

Import of metadata before 5.0 Variables: OMS import from SPSS get file = "SPSSfile.sav" . oms /destination format = oxml outfile = "OMSfile.xml" viewer = no . display . omsend . Questions: Blaise import Only on Windows servers with Blaise installed, uses the .bmi file Custom import Done for study Cultural Changes (Netherlands Institute for Social Research) Manually 11/14/2018

DDI 3.1 Import DDI 3.1 export already existed Import and export supports single wave and longitudinal studies Import and export supports multilingual questions 11/14/2018

DDI Import - Single wave StudyUnit Question Constructs Question Items ns1:DDIInstance s:StudyUnit d:DataCollection d:QuestionScheme d:ControlConstructScheme l:LogicalProduct l:CategoryScheme (multiple) l:CodeScheme (multiple) l:VariableScheme 11/14/2018

DDI Import - Longitudinal study StudyUnit Wave 1 Wave 2 Wave 3 Longitudinal study Question Constructs Question Items ns1:DDIInstance g:Group g:StudyUnit (multiple) s:StudyUnit d:DataCollection d:ControlConstructScheme l:LogicalProduct l:VariableScheme g:ResourcePackage d:QuestionScheme l:CategoryScheme (multiple) l:CodeScheme (multiple) 11/14/2018

DDI Import - Interface 11/14/2018

DDI used to transfer metadata Transfer data between one Questasy instance to another instance Transfer data between Questasy and other applications (TMT) Conclusion: it works! 11/14/2018

Data Downloadable SPSS/Stata files Variable basket Researcher can select variables Questasy produces custom dataset and codebook (PDF/HTML) Uses datawarehouse / StatTransfer 11/14/2018

Work in progress / Future work Routing of questionnaires Summary Statistics Sphinx search engine – use of prefixes Include routing and summary statistics into DDI import/export Implement DDI 3.2 Improve custom PDF codebooks 11/14/2018

Routing Input as text Simple parser of Blaise like syntax Keywords: if, then, else, elseif, endif, for, while, do, endwhile, endfor 11/14/2018

Variable Summary Statistics General table added to database Coupled to datawarehouse Calculates summary statistics for numeric values and frequency tables for categories 11/14/2018

Example of frequency table 11/14/2018

Licensing Free License agreement available Including source code License agreement available Available for non-profit scientific & government institutes 11/14/2018