Some Useful Estimates of the Kuder-Richardson Formula Number 20 Reliability Coefficient

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References

Lord, F. M. "Tests of the Same Length Do Have the Same Standard Error of Measurement." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, XIX ( 1959), 233-239.

Swineford, F. "Note on 'Tests of the Same Length Do Have the Same Standard Error Measurement.' " EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, XIX ( 1959), 241-242.

Tucker, L. R. "A Note on the Estimation of Test Reliability by the Kuder-Richardson Formula (20." Psychometrika, XIV (1949), 117-119.