Student Achievement files contain the student response data for the individual achievement items in the PIRLS achievement test. Students who participated in PIRLS were administered one of ten test booklets with questions. Some of these questions were multiple-choice questions and some were open-ended. The responses to the open-ended questions were coded using a one-digit coding system. The achievement test data files contain the answers to the multiple-choice questions and the codes assigned by the coders to the student responses for open-ended questions. Since under the PIRLS test design a student received only a fraction of the total test item pool, the variables for the items that were not included in the test booklet that was administered to the student are coded as not administered. The specific test booklet that was administered to the student is coded in the variable IDBOOK. The Student Achievement data files also contain a series of identification variables, sampling variables, and achievement variables. The data contained in this file can be linked to the Student Background data files by using the variables IDCNTRY and IDSTUD.
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