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Cogent Mathematics Volume 2, 2015 - Issue 1
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Research Article

A defense against the alleged unreliability of difference scores

David TrafimowDepartment of Psychology, New Mexico State University, MSC 3452, P.O. Box 30001, Las Cruces, NM88003-8001, USACorrespondence[email protected]
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Hamdi RaïssiIRMAR-INSA (UEB), FranceView further author information
(Reviewing Editor)
Article: 1064626 | Received 28 Aug 2014, Accepted 15 Jun 2015, Published online: 17 Jul 2015

Figures & data

Figure 1. The reliability of difference scores is presented as a function of the reliability of the individual tests and the true correlation.

Figure 1. The reliability of difference scores is presented as a function of the reliability of the individual tests and the true correlation.

Figure 2. The reliability of difference scores is presented as a function of the reliability of the individual tests, the true correlation, and the deviation ratio.

Figure 2. The reliability of difference scores is presented as a function of the reliability of the individual tests, the true correlation, and the deviation ratio.

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