Early Reaction Time Research in Psychology

Historical Origins and the Personal Equation00:00:43

Reaction time research began in the 18th century when astronomers noted discrepancies in transit time measurements, famously leading to the firing of an assistant by Neville Maskelyne. Friedrich Bessel later defined these individual differences as the 'personal equation'.

Technological Advancements in Measurement00:02:00

Technological progress, such as Charles Wheatstone's electromagnetic chronoscope and Matthias Hipp's improved version, allowed for more precise measurement of reaction times, revealing that visual responses are generally slower than auditory ones.

The Donders Subtraction Technique00:03:19

Franciscus Donders and his student Johan de Jaager developed the subtraction method to measure the speed of thought by comparing simple reaction times to those requiring complex decision-making processes.

Wundt and the Birth of Experimental Psychology00:04:13

Wilhelm Wundt adopted and refined these reaction time techniques, using the Hipp chronoscope to fracture mental processes into components like sensation and perception, effectively establishing the reaction time experiment as a foundation for experimental psychology.