In 1881 Wundt founded Philosophische Studien as a vehicle for the new experimental psychology, especially as a publication organ for the products of his psychological laboratory. The contents of Philosophische Studien (changed to Psychologische Studien in 1903) reveal that the experiments fell mainly into four categories: sensation and perception; reaction time; time perception and association; and attention, memory, feeling, and association. Optical phenomena led with 46 articles
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