The home background data files contain the responses of parents or primary caregivers to the questions in the Learning to Read Survey, or home questionnaire. To perform student-level analyses with student reading achievement scores and the home background data, these files must be merged with the student background data files, using the country and student identification variables, to perform analyses on the variables they contain.
The within-country scoring reliability data files contain data that can be used to investigate the reliability of the PIRLS constructed-response item scoring. The scoring reliability data files contain one record for each booklet that was double\ scored during the within-country scoring reliability exercise (see Barth, Kennedy, & Trong, 2007). For each constructed-response item in the achievement test, the following three variables are included in the scoring reliability data files:
• Original Score Variable (achievement item response scores obtained from
the first scorer)
• Second Score Variable (achievement item response scores obtained from
the second scorer)
• Score Agreement Variable (degree of agreement between the two scores).
The school background data files contain school principals’ responses to the questions in the school background questionnaire. School-level analyses where the schools are the units of analysis can be performed directly from the school background data files. To perform student-level analyses, the school background data files must be merged with the Student Background data files using the country and school identification variables.
The student achievement data file contains the student responses to the individual achievement items in the PIRLS reading test. The student achievement data file is best suited for performing item-level analyses. Achievement scores (plausible values) for each of the PIRLS 2006 reading scales are available in the student achievement data file, as well as in the background questionnaire data file. Thus, it is usually not necessary to link these two data file types.
Students who participated in PIRLS were administered one of 13 test booklets, each with a series of questions. Some of these questions were multiple-choice items and some were constructed-response items. The student achievement data files contain the actual responses to the multiple-choice questions and the scores assigned to the constructed-response items.
The student background data file contains students’ responses to the PIRLS 2006 student questionnaire. These files also contain a number of identification variables, tracking variables, sampling variables, and derived variables that were used for producing exhibits in the international report. In addition, the student background files contain the student reading achievement scores (plausible values).
The student-teacher linkage data files contain information required to link the student and teacher data files. The student-teacher linkage data files contain one entry per student-teacher linkage combination in the data. For instance, if three reading teachers are linked to a student, there are three entries in the file corresponding to that student. The sole purpose of the student-teacher linkage data files is to link teacher-level data with student-level data to perform appropriate student-level analyses.
The teachers of the students who were sampled for PIRLS were administered a teacher background questionnaire with questions pertaining to their background and their teaching practices in the classes of the sampled students. Each teacher was asked to respond to a questionnaire for each class taught that contained sampled students. The teacher background data files contain one record for each teacher who teaches the sampled students. If a teacher taught more than one class, he or she was expected to complete a questionnaire for each class taught. In the teacher background data files, each teacher is assigned a unique identification number (IDTEACH) and a link number (IDLINK) that is specific to the class taught by that teacher and to which the information in the data record.