Psychophysics: Method and Theory

absolute threshold assumption auditory brightness category scales changes comparative judgment comparison stimulus continua corresponding decibels detection situation determined difference threshold discrimination equation example experimental exponent false alarm Fechner's law Figure frequency range function of stimulus Gescheider increase increment intensity levels interval scale judged linear logarithmic loudness magnitude estimation magnitude production measurement modalities neural quantum theory noise normal distribution number of jnd's number system observer observer's criterion observer's judgments obtained ogive p(yes particular perceptual physical plotted power function power law predicted presented problem procedure psychological continuum psychological scale value psychometric function psychophysical function psychophysical magnitude function psychophysical scaling psychophysicists ratio scaling Receiver-operating characteristic receptor responses ROC curve S. S. Stevens scaling methods sensation magnitude sensory magnitude sensory system signal detection SN distributions sound pressure spatial summation standard stimulus stimulus intensity stimulus value Swets tone trials units validity variable vibration Weber's law z scores zero