absolute threshold


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Related to absolute threshold: Signal detection theory

ab·so·lute thresh·old

the lowest limit of any perception. Compare: differential threshold.
Synonym(s): stimulus threshold

absolute threshold

Etymology: L, absolutus, set loose; AS, therscold
1 the lowest point at which a stimulus can be perceived.
2 pertaining to millivolts of electrical charge determined by ion fluctuations or movement across plasma membranes that result in nerve or muscle stimulation.

Absolute Threshold

The lowest detectable intensity of a given signal—e.g., sound or light.

ab·so·lute thresh·old

(ab-sō-lūt threshōld)
Lowest limit of any perception.
References in periodicals archive ?
Electing to model adaptation with a 4[degrees]C absolute threshold shift for Milan would suggest that the least effect climate change will have on heat-related mortality is an additional 44 heat-related deaths (per 100,000) each year compared with the present day (Figure 2).
Labels that present aggregated information in terms of a threshold may employ absolute thresholds of nutritional value or relative thresholds that compare a product to other products within a food group.
Indeed, considering the large size of the standard errors of threshold estimates from Bayesian staircases (Alcala-Quintana & Garcia-Perez, 2004), those data points are so minimally below the respective absolute threshold that they could be considered within the threshold bias.
However, in practice absolute thresholds usually cannot withstand the pressures of changing circumstances and are not as absolute as the term would appear to imply.
An adaptive procedure similar to the up-down method (Levitt, 1971) was used to track absolute thresholds of the horn sounds in each of the background noise conditions as well as in quiet.