Sensory thresholds
3 important questions on Sensory thresholds
Three laws or general rules to he psychophysical function.
Weber
Fechner
Stevens
Fechner
Stevens
ASTM: chemical senses threshold =
A concentration range exists below which the odor or taste of a substance will not be detectable under any practical circumstances, and above which individuals with a normal sense of smell or taste would readily detect the presence of the substance.
Conceptual notion of threshold =
An energy level below which detection never occurs and above which detection always occurs
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