Definition of "psychophysics" []

• The branch of psychology that deals with the relationships between physical stimuli and sensory response. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The term psychophysics is employed to denote a branch of experimental psychology which seeks to establish quantitative laws describing the general relations of intensity exhibited in various kinds of conscious states under certain conditions."
• ""A book on the atomic theory, classic also; four elaborate mathematical and experimental volumes on what he called psychophysics (many persons consider Fechner to have practically founded scientific psychology in the first of these books); a volume on organic evolution, and two works on experimental æsthetics, in which again Fechner is thought by some judges to have laid the foundations of a new science," are among his other performances ...."
• "A book on the atomic theory, classic also; four elaborate mathematical and experimental volumes on what he called psychophysics -- many persons consider Fechner to have practically founded scientific psychology in the first of these books; a volume on organic evolution, and two works on experimental aesthetics, in which again Fechner is considered by some judges to have laid the foundations of a new science, must be included among these other performances."