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Lecture 4: Principles of Psychometrics: Reliability II - jhsph ocw

Lecture 4: Principles of Psychometrics: Reliability II - jhsph ocw

Lecture 4: Principles of Psychometrics: Reliability II - jhsph ocw

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<strong>Reliability</strong> <strong>of</strong> Individual Scores in<br />

Unique Rater Design<br />

MSB − MSW<br />

MSB + ( m −1)<br />

MSW<br />

Where m = number <strong>of</strong> raters per TA<br />

Continuing with our example:<br />

( 12.<br />

67 −1.<br />

50)<br />

Re liability<br />

=<br />

=<br />

12.<br />

67 + ( 3−1)<br />

* 1.<br />

50<br />

. 7128

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