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Activity Number:
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22
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Type:
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Contributed
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Date/Time:
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Sunday, August 11, 2002 : 2:00 PM to 3:50 PM
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Sponsor:
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Biometrics Section*
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| Abstract - #300854 |
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Title:
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Analysis of Rater Agreement by Item Response Models
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Author(s):
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Jørgen Petersen*+ and Svend Kreiner+
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Affiliation(s):
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University of Copenhagen and University of Copenhagen
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Address:
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3 Blegdamsvej, Copenhagen, , 2200, Denmark 3 Blegdamsvej , Copenhagen N, International, DK-2200, Denmark
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Keywords:
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Abstract:
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An item response model for the assessment of multiple rater agreement for categorical responses is discussed. Differences between raters are modelled using random effects, which allows a straightforward description of the inter-rater variability. Further, a measure of the degree of rater agreement is presented. This measure has an attractive interpretation and is independent of the sampling distribution of the assessed individuals. The model's applicability is illustrated with data on the potential benefit with respect to perinatal mortality of Doppler ultra sound velocimetry. In the study, 32 international experts were asked to evaluate 139 ultrasound pictures and give their expert opinion on whether perinatal mortality was potentially avoidable if the child was electively delivered subsequent to abnormal ultra sound results.
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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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