Abstract
It is often desirable for mental health practitioners to combine standard scores from different tests, raters, or times into a single composite standard score. Most often the result is a more reliable and accurate standard score. This paper describes a computer program that uses two standard scores, score reliability and correlation with a third variable, to yield a composite standard score, reliability and correlation. Trends, limitations, optimum benefits, and examples are discussed. References are provided for calculating composites based on more than two scores.
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A copy of the compiled program is available from the author upon receipt of a self-addressed, postage-paid mailer and one DOS-formatted, high-density floppy disk.
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Evans, L.D. A two-score composite program for combining standard scores. Behavior Research Methods, Instruments, & Computers 28, 209–213 (1996). https://doi.org/10.3758/BF03204767
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DOI: https://doi.org/10.3758/BF03204767