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The sensitivity index or discriminability index or detectability index is a dimensionless statistic used in signal detection theory. A higher index indicates that the signal can be more readily detected.
The sensitivity index or d′ (pronounced "dee-prime") is a statistic used in signal detection theory. It provides the separation between the means of the signal and the noise distributions, compared against the standard deviation of the noise distribution.
Detection theory or signal detection theory is a means to measure the ability to differentiate between information-bearing patterns (called stimulus in living organisms, signal in machines) and random patterns that distract from the information (called noise, consisting of background stimuli and random activity of the detection machine and of the nervous system of the operator).
Detection theory, or signal detection theory, is a means to quantify the ability to discern between signal and noise. Subcategories. This category has only the ...
Participants were tasked to report when they detected the larger jumps. Mackworth's results indicated a decline in signal detection over time, known as a vigilance decrement. The participants' event detection declined between 10 and 15 percent in the first 30 minutes and then continued to decline more gradually for the remaining 90 minutes.
Modern applications rely heavily on threshold measurement, [3] ideal observer analysis, and signal detection theory. [4] Psychophysics has widespread and important practical applications. For instance, in the realm of digital signal processing, insights from psychophysics have guided the development of models and methods for lossy compression ...
D' may resemble: D' (D + apostrophe), the contracted form of words in several languages (for example, a French indefinite article); for a full list, see the Wiktionary entry; Dʼ (D + modifier apostrophe), Slavic notation for palatalised d; Ď, ď in lower case (D + caron), a letter of the Czech and Slovak alphabets
A minimum detectable signal is a signal at the input of a system whose power allows it to be detected over the background electronic noise of the detector system. It can alternately be defined as a signal that produces a signal-to-noise ratio of a given value m at the output. In practice, m is usually chosen to be greater than unity.