4391 Fechner _ Weber

4391 Fechner _ Weber - Precursors to a Modern Psychology...

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Precursors to a Modern Psychology Gustav Theodor Fechner Psychophysics, founded in 1860 by German psychologist and pioneer of experimental psychology Gustav Theodor Fechner (1801–1887). 1860 – Fechner wrote Elements of Psychophysics – describing his equation. Measuring jnd (just noticeable difference) was the unit of psychological measurement – the average physical stimulus that is either initially detected is the absolute threshold – e.g., at what stimulus intensity level do you see, hear, smell something). The jnd, when you notice that a stimulus intensity is different from the previous one or different from a constant (second) stimulus, is called a difference threshold . Fechner described methods for studying jnd’s, the Method of Limits (ascending or descending order of intensity), Method of Constant Stimuli, Method of Adjustment. In the latter, subject rather than experimenter adjusts the stimulus intensity. Psychophysics is the area of psychology concerning associations linking physical stimuli to psychological sensation
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4391 Fechner _ Weber - Precursors to a Modern Psychology...

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