logit

English

Etymology

Blend of logistic +‎ unit, by analogy with probit, coined by Joseph Berkson in 1944: “I use this term [logit] for $\ln p/q$ following Bliss, who called the analogous function which is linear on $x$ for the normal curve ‘probit.’”

Pronunciation

• (US) IPA^(key): /ˈloʊd͡ʒɪt/, /ˈlɑd͡ʒɪt/
• (UK) IPA^(key): /ˈlɒd͡ʒɪt/

• Audio (US):

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Noun

logit (plural logits)

1. (mathematics) the inverse of the "sigmoid" or "logistic" function used in mathematics, especially in statistics. The logit of a number p between 0 and 1 is given by the formula:

   $\operatorname {logit} (p)=\log \left({\frac {p}{1-p}}\right)=\log(p)-\log(1-p).\!\,$

Related terms

• probit

See also

• bit

Old Norse

Participle

logit

1. strong neuter nominative/accusative singular of loginn

Verb

logit

1. supine of ljúga