D'
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- The correct title of this article is d'. The initial letter is shown capitalized due to technical restrictions.
The sensitivity index or d' (pronounced 'dee-prime') is a statistic used in signal detection theory.
d' measures the separation between the means of the signal and noise distributions in units of the standard deviation of the noise distribution. An estimate of d' can be found from measurements of the hit rate and false-alarm rate.
A higher d' indicates that the signal can be more readily detected.
[edit] See also
[edit] Reference
- Elementary Signal Detection Theory by Thomas D. Wickens (Ch.2, p.20).
