A certain species of rodent can just tell the difference between plain water and water that contains 1 gram of salt per liter of water (a 1% solution) . What does this best illustrate?

A) an Applied of Fechner's law
B) the constancy of the Weber fraction
C) an exception to the rules of signal detection
D) the difference threshold for this particular rodent

Weber Fraction

A principle stating that the smallest change in a stimulus that can be detected is a constant proportion of the starting level of that stimulus.

Difference Threshold

The smallest change in stimulation that can be noticed by an individual half of the time, also referred to as the "just noticeable difference" (JND).

Applied Of Fechner's Law

The practical application of Fechner's principle, which relates the intensity of a physical stimulus to the intensity of the sensation it produces.