ABSTRACT
Wilhelm Wundt used Ernst Heinrich Weber and Gustav T. Fechner’s work on the relationship between subjective and physical intensities as a key component in the establishment of psychology as an independent science. Edward Bradford Titchener was responsible for introducing Wundt’s voluntarism to the United States under the name of structuralism. Wundt’s conceptualization of the psychological experiment was the first in a series of three specific models that have been integral steps in the construction of the psychological experiment. There are: Leipzig model, Parisian model and American model. The chapter describes the role that psychophysics played in the development of Wundt’s psychology of voluntarism. It explains the social development of the psychology experiment. Fechner introduced three psychophysical methods into psychology that were very important to Wilhelm Wundt when he launched psychology as a laboratory-based experimental science in 1879. There are: method of just noticeable differences, method of average effort or adjustment and method of constant stimuli or right and wrong.
