Why is psychophysics important?
Psychophysics had an important immediate impact on psychology, sensory physiology, and related fields, because it provided a means of measuring sensation which previously, like all other aspects of the mind, had been consid- ered private and immeasurable.
How is psychophysics used today?
Psychophysical methods are used today in studies of sensation and in practical areas such as product comparisons and evaluations (e.g., tobacco, perfume, and liquor) and in psychological and personnel testing.