"Psychophysics" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure, which enables searching at various levels of specificity.
MeSH information
The science dealing with the correlation of the physical characteristics of a stimulus, e.g., frequency or intensity, with the response to the stimulus, in order to assess the psychologic factors involved in the relationship.

This graph shows the total number of publications written about "Psychophysics" by people in this website by year, and whether "Psychophysics" was a major or minor topic of these publications.
Bar chart showing 1061 publications over 29 distinct years, with a maximum of 98 publications in 2009
To see the data from this visualization as text, click here.