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 Analyzer Installation process Selecting and merging data Hands-on training

Table of content Introduction to the IEA IDB Analyzer Installation process Selecting and merging data Hands-on training

Introduction to IDB Analyzer WHAT IT IS A software program developed by the IEA Data Processing and Research Center to analyze the data from ICCS and other IEA surveys Calculates correct standard errors when conducting analysis with ICCS Uses optimized algorithms for computing means, percentages and regressions BONUS! Easy creation of data sets for use in SPSS Merging countries and/or data levels Selection of analysis variables

What can it do? For ICCS, compute percentages, means (and SD), correlations, and linear regressions – including their respective standard errors Allows 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 Analyzer Installation process Selecting and merging data Hands-on training

Download IDB Analyzer The IDB Analyzer is available for download at the IEA website: Select the “IEA Studies Datasets and Data Analyzers” subsection Download the “IDBAnalyzer_Setup.exe” file from there

Installation process SPSS 11 or higher needs to be installed beforehand Administrator rights are required for installation process IDB Analyzer has two modules Merge – our starting point Analyze

Installation process Double click on the setup file (Seminar version: C:\ICCS2009\Software\IDB_Analyzer\IDBAnalyzer_Setup_v exe)

Installation process

Table of content Introduction to the IEA IDB Analyzer Installation process Selecting and merging data Hands-on training

How to Open the IDB Analyzer Start > Programs > IEA > IDB Analyzer > Merge Module

What You Will See …

Merge Module Select... Data Source Directory

Study Year Grade Merge Module Select... Data Source Directory

Participants Merge Module Select... Data Source Directory Study Year Grade

Participants Merge Module Select... Data Source Directory Study Year Grade

Merge Module Edit the country list to edit the country labels Example: translate „Spain“ to „España”

Merge Module Save and confirm the change with „Yes“ and „Save“

Merge Module To undo change go to „Edit Country List“  „Restore Defaults“ and confirm with „Yes“

Participants Merge Module Select... Data Source Directory Study Year Grade

Participants Merge Module Select... Data Source Directory Study Year Grade

Participants Merge Module Select... Data Source Directory Study Year Grade

Participants Merge Module Select... Data Source Directory Study Year Grade Next>>

File Types Merge Module Select... Variables

File Types Merge Module Select... Variables

File Types Merge Module Select... Variables

File Types Merge Module Select... Variables

File Types Merge Module Select... Variables ID and Sampling Variables are selected automatically.

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

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 > All The 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)!

Thank you for your attention!

Table of content Introduction to the IEA IDB Analyzer Installation walkthrough Selecting and merging data Hands-on training

Hands-on Training Copy files from the USB-stick to your C:\ drive Install IDB Analyzer from C:\ICCS2009\Software\IDB_Analyzer Open the IDB Analyzer Merge Module Define data source: C:\ICCS2009\Data Select all countries Select all variables from the School Questionnaire file and the Int. Student Questionnaire file Define file name: C:\ICCS2009\Work\ICG_ISG_INTC2.sps Start SPSS Run all in the *.sps SPSS script to create *.sav SPSS data file