ICCS 2009 IDB Seminar – Nov 24-26, 2010 – IEA DPC, Hamburg, Germany
Using the IEA IDB Analyzer to merge and analyze data
Table of content
Introduction to the IEA IDB AnalyzerInstallation processSelecting and merging dataHands-on training
Table of content
Introduction to the IEA IDB AnalyzerInstallation processSelecting and merging dataHands-on training
Introduction to IDB AnalyzerWHAT IT IS
A software program developed by the IEA Data Processing and Research Center to analyze the data from ICCS and other IEA surveysCalculates correct standard errors when conducting analysis with ICCSUses optimized algorithms for computing means, percentages and regressions
BONUS!Easy creation of data sets for use in SPSSMerging countries and/or data levelsSelection of analysis variables
What can it do?
For ICCS, compute percentages, means (and SD), correlations, and linear regressions – including their respective standard errorsAllows to analyze data calculating the correct standard errors using JRR (jackknife repeated replication)Enhanced SPSS and MS Excel output including adding titles to tables and column labels
Why Do We Need IDB Analyzer?
Very common question:“Why can’t I just do this in SPSS?”Answer:“Because of the data structure!”
Sampling is multi-stage, clustered, and stratified which can not be handled correctly by SPSS (remember the Weights and Variance Estimation presentation)SPSS can not do variance estimation based on replicated weights
IDB Analyzer handles these issues and “adds” the missing features to SPSS!
Table of content
Introduction to the IEA IDB AnalyzerInstallation processSelecting and merging dataHands-on training
Download IDB AnalyzerThe IDB Analyzer is available for download at the IEA website:
www.iea.nlSelect the “IEA Studies Datasets and Data Analyzers” subsectionDownload the “IDBAnalyzer_Setup.exe” file from there
Installation process
SPSS 11 or higher needs to be installed beforehandAdministrator rights are required for installation processIDB Analyzer has two modules
Merge – our starting pointAnalyze
Installation processDouble click on the setup file (Seminar version: C:\ICCS2009\Software\IDB_Analyzer\IDBAnalyzer_Setup_v2.0.0.37.exe)
Table of content
Introduction to the IEA IDB AnalyzerInstallation processSelecting and merging dataHands-on training
Merge Module
Edit the country list to edit the country labels
Example: translate „Spain“ to „España”
Supported File Type Merges
Any student files can be merged together.Any student files can be merged with the School Questionnaire file.Teacher Questionnaire file can be merged with the School Questionnaire file.Student files cannot be merged directly with the Teacher Questionnaire file.
Define File
Name and Save
Merge Module
File Types
Select...
Variables
Start SPSS
SPSS syntax file is stored in specified directory.
IDB Analyzer launches SPSS and opens the syntax file automatically.
Merge Module
From the SPSS syntax editor choose:Run > AllThe syntax is executed and the merged file is saved under the location you have chosen in the last step of the IDB Analyzer Merge Module
Merge Module
You can now start analyzing your data using the Analysis Module of
the IDB Analyzer.
More on this in the next presentation(s)!
Table of content
Introduction to the IEA IDB AnalyzerInstallation walkthroughSelecting and merging dataHands-on training
Hands-on Training
Copy files from the USB-stick to your C:\ driveInstall IDB Analyzer from
C:\ICCS2009\Software\IDB_AnalyzerOpen the IDB Analyzer Merge Module
Define data source: C:\ICCS2009\DataSelect all countriesSelect all variables from the School Questionnaire file and the Int. Student Questionnaire fileDefine file name: C:\ICCS2009\Work\ICG_ISG_INTC2.spsStart SPSS
Run all in the *.sps SPSS script to create *.sav SPSS data file