Value-Added to What? How a Ceiling in the Testing Instrument Influences Value-Added Estimation
AbstractValue-added measures of teacher quality may be sensitive to the quantitative properties of the testing instruments upon which they are based. This paper focuses on the sensitivity of value-added to a particularly relevant testing-instrument property test-score-ceiling effects. Test-score ceilings are likely to be increasingly common in testing instruments across the country as education policy continues to emphasize proficiency-based reform. Encouragingly, we show that over a wide range of test-score- ceiling severity, teachers value-added estimates are only negligibly influenced by ceiling effects. However, as ceiling conditions approach those found in minimum-competency testing environments, value-added results are significantly altered.
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Bibliographic InfoPaper provided by Department of Economics, University of Missouri in its series Working Papers with number 0807.
Length: 53 pgs.
Date of creation: 15 Jun 2008
Date of revision:
Value Added; Test Score Ceiling; Ceiling Effects; Teacher Quality; Teacher Value Added;
Other versions of this item:
- Cory Koedel & Julian Betts, 2010. "Value Added to What? How a Ceiling in the Testing Instrument Influences Value-Added Estimation," Education Finance and Policy, MIT Press, vol. 5(1), pages 54-81, January.
- Cory Koedel & Julian Betts, 2009. "Value-Added to What? How a Ceiling in the Testing Instrument Influences Value-Added Estimation," NBER Working Papers 14778, National Bureau of Economic Research, Inc.
- I20 - Health, Education, and Welfare - - Education - - - General
- I21 - Health, Education, and Welfare - - Education - - - Analysis of Education
- J24 - Labor and Demographic Economics - - Demand and Supply of Labor - - - Human Capital; Skills; Occupational Choice; Labor Productivity
This paper has been announced in the following NEP Reports:
- NEP-ALL-2008-09-13 (All new papers)
- NEP-EDU-2008-09-13 (Education)
- NEP-URE-2008-09-13 (Urban & Real Estate Economics)
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