psych 421- notes #5 - H e r man Van Helmholtz - Greatest of...

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Herman Van Helmholtz - Greatest of the 19 th century: he was a student of Muller. - Physics was his passion since he was a small boy - He made contributions in physics, physiology, and psychology. Biggest Contributions to psychology: - The Trichromatic theory of color vision. - He says that people perceive green, red, and blue - He also came up with the theory of auditory perception. - He measured the speed of neural impulse (90 feet per second). In frogs. - He showed that thought and action are successive not instantaneous. - He strengthened experimental approach to study of psychological issues. The Rise of Experimental Psychology:- - With advances in science, there was much learned about physical stimulation and sense receptors. - Question remained: how are mental sensations and physical world related? - The ability to measure how mental events vary with physical events was needed; also a group of scientists-> psycho-physists were needed. Ernest Weber (1795-1878):- - He’s the third of 13 children; his father was a theology professor.
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- He did groundbreaking work on skin and muscle sensation- Kinestisene (muscle sense). -
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psych 421- notes #5 - H e r man Van Helmholtz - Greatest of...

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