Testing the Testing: Validity of a State Growth Model
Possible threats to the validity of North Carolina’s accountability model used to predict academic growth were investigated in two ways: the state’s regression equations were replicated but updated to utilize current testing data and not that from years past as in the state’s current model; and the...
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Simon Fraser University
2008-09-01
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Series: | International Journal of Education Policy and Leadership |
Online Access: | http://journals.sfu.ca/ijepl/index.php/ijepl/article/view/106/51 |
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doaj-a5f2ac0dd2324601a5e33defb13074bf2021-09-02T08:50:42ZengSimon Fraser UniversityInternational Journal of Education Policy and Leadership1555-50622008-09-0136Testing the Testing: Validity of a State Growth Model KIM TRASK BROWNPossible threats to the validity of North Carolina’s accountability model used to predict academic growth were investigated in two ways: the state’s regression equations were replicated but updated to utilize current testing data and not that from years past as in the state’s current model; and the updated equations were expanded to include additional socioeconomic, financial, and demographic variables. The updated equations were found to explain a very low proportion of the variance in growth statewide, with R2 values ranging from .054 to .135. This suggests that the state’s model is extremely unpredictive of academic growth. The expanded equations were found to offer almost twice as much predictive power as the updated equations and, hence, the state’s model.http://journals.sfu.ca/ijepl/index.php/ijepl/article/view/106/51 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
KIM TRASK BROWN |
spellingShingle |
KIM TRASK BROWN Testing the Testing: Validity of a State Growth Model International Journal of Education Policy and Leadership |
author_facet |
KIM TRASK BROWN |
author_sort |
KIM TRASK BROWN |
title |
Testing the Testing: Validity of a State Growth Model |
title_short |
Testing the Testing: Validity of a State Growth Model |
title_full |
Testing the Testing: Validity of a State Growth Model |
title_fullStr |
Testing the Testing: Validity of a State Growth Model |
title_full_unstemmed |
Testing the Testing: Validity of a State Growth Model |
title_sort |
testing the testing: validity of a state growth model |
publisher |
Simon Fraser University |
series |
International Journal of Education Policy and Leadership |
issn |
1555-5062 |
publishDate |
2008-09-01 |
description |
Possible threats to the validity of North Carolina’s accountability model used to predict academic growth were investigated in two ways: the state’s regression equations were replicated but updated to utilize current testing data and not that from years past as in the state’s current model; and the updated equations were expanded to include additional socioeconomic, financial, and demographic variables. The updated equations were found to explain a very low proportion of the variance in growth statewide, with R2 values ranging from .054 to .135. This suggests that the state’s model is extremely unpredictive of academic growth. The expanded equations were found to offer almost twice as much predictive power as the updated equations and, hence, the state’s model. |
url |
http://journals.sfu.ca/ijepl/index.php/ijepl/article/view/106/51 |
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