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Can a Test Be Too Reliable?

Author(s):
Wainer, Howard
Publication Year:
1985
Report Number:
RR-85-19, PSRTR-85-59
Source:
ETS Research Report
Document Type:
Report
Page Count:
8
Subject/Key Words:
Statistical Analysis, Test Reliability, Test Theory, Testing Problems

Abstract

It is shown that summary statistics which are commonly used to measure test quality (reliability, mean rbis, and mean proportion correct) can be seriously misleading. This is demonstrated and explained. (6pp.)

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