The PIRLS and prePIRLS 2011 student achievement data files contain the student responses to the individual achievement items in the PIRLS and prePIRLS 2011 assessments. The student achievement data files are best suited for performing item-level analyses. Achievement scores (plausible values) for all of the PIRLS and prePIRLS 2011 achievement scales are available in the student achievement data files, as well as in the student background data files and student-teacher linkage data files. Students who participated in PIRLS 2011 were administered one of 13 booklets and students in prePIRLS 2011 were administered one of 12 assessment booklets, each with two reading passages and their accompanying items. Some of these items 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 codes assigned to the constructed response items through the scoring guides.
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