This is the program for the 2010 Joint Statistical Meetings in Vancouver, British Columbia.
Abstract Details
Activity Number:
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162
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Type:
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Topic Contributed
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Date/Time:
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Monday, August 2, 2010 : 10:30 AM to 12:20 PM
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Sponsor:
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Social Statistics Section
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Abstract - #308976 |
Title:
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Multivariate Tobit Analysis of Test-Score Ceiling Effects
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Author(s):
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Yan Yang*+
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Companies:
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Arizona State University
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Address:
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School of Mathematical and Statistical Sciences, Tempe, AZ, 85287,
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Keywords:
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AIMS test ;
Censoring ;
EM algorithm ;
Perfect score ;
School effect ;
Unequal covariance matrices
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Abstract:
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As proficiency-based reform continues to be emphasized across the United States, minimum-competency state tests have been increasingly used. It is not uncommon in such a testing instrument to observe a sizeable portion of students achieving the maximum possible score, which invalidates the normality assumption widely adopted for test-score based student achievement models. We develop a multivariate Tobit model with covariate-dependent error covariance matrices that allows for the occurrence of score ceilings. The practical utility of the proposed method is illustrated with simulation and AIMS test data.
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The address information is for the authors that have a + after their name.
Authors who are presenting talks have a * after their name.
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