Map of Monee on In the method of constant stimuli, for example, it is the proportion of yes responses (i.e., that the stimulus was perceived) as a function of physical magnitude of the stimuli. Also called psychometric function. psychophysical method any of the standard techniques used in investigating psychophysical problems, such as the method of adjustment and the method of LIMITS. psychophysical scaling any of the procedures used to construct scales relating physical stimulus properties to perceived magnitude. Methods are often classified as direct or indirect, based on whether the observer directly judges magnitude. Map of Monee 2016.