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reliability coefficient

(symbol: rxx) an index describing the consistency of scores across contexts (e.g., different times, items, or raters). Its value, ranging from 0 to 1, provides an estimate of the amount of obtained score variance that is due to true variance rather than to error. The larger this coefficient, the more confident a researcher may be that scores obtained at different times under similar conditions with the same participants will be alike. Typically, reliability coefficients are considered to be acceptable if they are above .80. Also called coefficient of reliability; index of reliability; reliability index.

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Psychology term of the day

February 16th 2025

morbid obesity

morbid obesity

the condition of having a body mass index over 39 or weighing 50% to 100% over one’s ideal weight. Morbid obesity is associated with diabetes mellitus, heart disease, joint pain, sleep apnea, and stroke.