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  • The Reliability and Validity of Achievement Tests in the Young Lives Ethiopia School Survey Round 2

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The Reliability and Validity of Achievement Tests in the Young Lives Ethiopia School Survey Round 2

June, 2015
Juan Leon
Yessenia Collahua
  • Education
Young Lives Technical Note 33
PDF icon YL-TN33_Reliability and Validity of Achievement Tests Ethiopia.pdf

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This technical note gives details of the reliability and validity of the assessments used in the second school survey carried out by Young Lives in Ethiopia for the purpose of the construction of test scores on a common scale within each language for maths and reading comprehension. This document give details of the three-parameter model used to build the achievement scores in both content areas. We tested graphically for item fit and item bias (by gender and wave). Our results indicate that most of the items used have a good item fit as well as they did not show the presence of bias by wave or gender. Finally, we did an external validity analysis correlating the IRT scores (maths and reading comprehension) with individual and family characteristics, and the results showed that correlations were statistically significant with the expected signs.
 

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