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Interpretations of Reliability

Author(s):
Haberman, Shelby J.
Publication Year:
2005
Report Number:
RR-05-29
Source:
ETS Research Report
Document Type:
Report
Page Count:
6
Subject/Key Words:
Reliability, Concordance, Cut Points, Interval Estimation

Abstract

Some probabilistic illustrations of the reliability coefficient are provided to assist in interpretation of this measure. All explanations are derived under the assumption that the joint distribution of examinee scores from two parallel tests is well approximated by a bivariate normal distribution.

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