Dear all,
For the next Quant SIG Seminar meeting (Monday, 30th January), John Fletcher (Department of Education, Oxford University) will be presenting on the following topic:
Measurement Error and School Effects
This promises to be an excellent talk. As usual the Quant SIG will meet in Seminar Room J from 12:15pm-2pm, Department of Education, 28 Norham Gardens, Oxford OX2 7PY. If you do not have access to the building, please contact Patrick Alexander ([log in to unmask]) to arrange access.
Please find the abstract for this week's talk below.
Best wishes,
Patrick Alexander
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Title: Measurement Error and School Effects.
Abstract:
Historically, school effectiveness has been estimated using multi-level models, which have not taken account of measurement error. Failure to take account of measurement error leads to biased estimation. In this case study, I investigated whether taking account of measurement error in the English Contextual Value Added model leads to substantively important differences in the overall size of school effects or in the ranking of schools.
I took account of measurement error on National Curriculum end stage tests used in this model by comparing pupils' scores on pairs of similar tests. I tested the sensitivity of the model to measurement error on eligibility for free school meals (FSM) by fitting hypothetical error variances and by incorporating a contextual aggregate in the model.
I found that taking account of measurement error has little impact on the estimation of school effectiveness in this model. The inclusion of a contextual aggregate for FSM marginally reduced the estimated variation in the contribution of schools.
**
Dr. Patrick Alexander
Department of Education, University of Oxford
St. Hugh's College
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