User Guide for the TIMSS International Database.pdf - TIMSS and ...
User Guide for the TIMSS International Database.pdf - TIMSS and ...
User Guide for the TIMSS International Database.pdf - TIMSS and ...
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Chapter 7<br />
Content <strong>and</strong> Format of <strong>Database</strong> Files<br />
7.1 Introduction<br />
This chapter describes <strong>the</strong> content <strong>and</strong> <strong>for</strong>mat of <strong>the</strong> <strong>TIMSS</strong> <strong>International</strong> <strong>Database</strong> <strong>for</strong> Population<br />
1 <strong>and</strong> Population 2. This chapter is organized in five major sections corresponding to <strong>the</strong> types of<br />
files included in <strong>the</strong> database. Within each section, <strong>the</strong> contents of <strong>the</strong> files are described. These<br />
file types are:<br />
· Data Files<br />
· Codebook Files<br />
· Program Files<br />
· Data Almanacs<br />
· Test-Curriculum Matching Analysis Files<br />
The <strong>TIMSS</strong> international Data Files reflect <strong>the</strong> result of an extensive series of data management<br />
<strong>and</strong> quality control steps taken to insure <strong>the</strong> international comparability, quality, accuracy, <strong>and</strong><br />
general utility of <strong>the</strong> database in order to provide a strong foundation <strong>for</strong> secondary analyses. 1 As<br />
part of <strong>the</strong> international data files, all variables derived <strong>for</strong> reporting in <strong>the</strong> international reports<br />
are included. In addition, analysis notes are provided <strong>for</strong> all reporting variables, allowing users to<br />
replicate <strong>the</strong>se computations. These analysis notes are included in Supplement 4 of this <strong>User</strong><br />
<strong>Guide</strong>.<br />
Also included in <strong>the</strong> database are Codebook Files. These specifically document <strong>the</strong> <strong>for</strong>mat of all<br />
variables in each of <strong>the</strong> data files. Several Program Files are provided <strong>for</strong> use in secondary<br />
analyses, including Data Access Control files <strong>for</strong> converting <strong>the</strong> raw data files provided in ASCII<br />
<strong>for</strong>mat into SAS or SPSS files, macro programs <strong>for</strong> computing statistics using <strong>the</strong> jackknife<br />
repeated replication method discussed in Chapter 8, <strong>and</strong> macro programs <strong>for</strong> converting cognitive<br />
item response codes to score values used in <strong>the</strong> computation of international scores. Data<br />
Almanac Files contain unweighted summary statistics <strong>for</strong> each participating country, on each<br />
variable in <strong>the</strong> student, teacher, <strong>and</strong> school background questionnaires. To investigate <strong>the</strong> match<br />
between <strong>the</strong> <strong>TIMSS</strong> achievement tests <strong>and</strong> <strong>the</strong> curriculum in participating countries, country<br />
representatives indicated whe<strong>the</strong>r or not each test item addressed a topic in <strong>the</strong>ir curriculum. The<br />
Test-Curriculum Matching Analysis Files contain this in<strong>for</strong>mation <strong>for</strong> each country. The<br />
following sections describe each of <strong>the</strong> file types <strong>and</strong> how <strong>the</strong>y can be used to access <strong>and</strong> analyze<br />
<strong>the</strong> <strong>TIMSS</strong> international data <strong>for</strong> students, teachers, <strong>and</strong> schools.<br />
1 For more detailed in<strong>for</strong>mation about data entry, data processing, data cleaning, data management, database structure, as<br />
well as analysis <strong>and</strong> reporting of <strong>the</strong> <strong>TIMSS</strong> data, see <strong>the</strong> <strong>TIMSS</strong> Technical Reports, Volumes I <strong>and</strong> II (Martin <strong>and</strong> Kelly,<br />
1996;1997) <strong>and</strong> <strong>TIMSS</strong>: Quality Assurance in Data Collection (Martin <strong>and</strong> Mullis, 1996).<br />
T I M S S D A T A B A S E U S E R G U I D E 7 - 1