How Accurate are the STAR
Scores for Individual Students?
An interpretive guide. |
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David
Rogosa
Stanford University rag@stat.stanford.edu |
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The
goal here is to apply some common-sense descriptions of accuracy to the
numbers or classifications that are used to indicate student achievement in STAR . |
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National
Percentile RanksVersion 2.0 August, 2003: CAT/6 Survey, CTB/McGraw-Hill Version 1.0 August, 1999: Stanford 9, Harcourt CRESST Technical Report 509A |
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Education
Week Article October 6, 1999 Stanford Report Questions Accuracy of Tests New York Times Column, September 13, 2000 How Tests Can Drop The Ball |
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California
Standards Tests (CST)Version
3.0 August, 2004: California Standards
Tests: Math, ELA 2002, 2003.direct downland: llclassify computational function |
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Also. If you have a liking for reliability coefficients, try out the shoe-shopping example | |||||||||

Supporting
Materials: Percentile Rank Scores Many
informal statements and references in the NPR Accuracy
Guides are given explicit, mathematical definition in
two CRESST
Technical Reports released in concert with the Version
1.0 Accuracy Guide.So for those who might be interested in technical details and underpinnings for these calculations, the two related CRESST Technical Reports are 1. Accuracy
of Individual Scores Expressed in Percentile Ranks: Classical Test Theory Calculations CRESST Technical Report 509, September, 1999 2. Accuracy
of Year-1, Year-2 Comparisons Using Individual Percentile Rank Scores: Classical
Test Theory Calculations CRESST Technical Report 510, September, 1999 |
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