noncentrality parameter

in many probability distributions used in significance testing, a parameter that has a value different from zero when the null hypothesis under test is false. This parameter is important in determining the power of a statistical procedure. See noncentral distribution.

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Psychology term of the day

December 23rd 2024

delta rule

delta rule

the principle that the change in strength of an association during learning is a function of the difference between the maximal strength possible and the current strength of the association. The delta rule is used in associationistic learning theory (see associative learning).