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appointed¡¡to¡¡the¡¡faculty¡¡of¡¡the¡¡Massachusetts¡¡Institute¡¡of¡¡Technology¡¡£¨MIT£©¡¡in¡¡1959£»¡¡but¡¡returned¡¡to¡¡
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most¡¡widely¡¡accepted¡¡theory¡¡of¡¡pain¡¡sensation¡¡and¡¡regulation¡£¡¡Its¡¡implications¡¡have¡¡influenced¡¡not¡¡
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1843¡¡S¡£ren¡¡Kierkegaard¡¡published¡¡Either/Or¡£¡¡
1846¡¡Ernst¡¡Weber¡¡postulated¡¡that¡¡the¡¡difference¡¡threshold¡¡is¡¡a¡¡constant¡¡proportion¡¡of¡¡the¡¡initial¡¡
stimulus¡¡intensity£»¡¡a¡¡notion¡¡later¡¡formalized¡¡as¡¡Weber¡¯s¡¡Law¡£¡¡
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vision¡¡is¡¡due¡¡to¡¡three¡¡different¡¡types¡¡of¡¡color¡¡receptors¡¡£¨cones£©£»¡¡each¡¡of¡¡which¡¡is¡¡sensitive¡¡to¡¡
a¡¡specific¡¡range¡¡of¡¡wavelengths¡¡of¡¡light¡£¡¡
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psychophysics£»¡¡the¡¡study¡¡of¡¡the¡¡relationship¡¡between¡¡subjective¡¡experience¡¡and¡¡physical¡¡
stimulation¡£¡¡
1898¡¡The¡¡Spanish¡American¡¡War¡¡was¡¡fought¡£¡¡
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1938¡¡H¡£¡¡Keffer¡¡Hartline¡¡discovered¡¡that¡¡optic¡¡nerve¡¡fibers¡¡respond¡¡to¡¡stimulation¡¡from¡¡different¡¡
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thresholds¡£¡¡
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magnitude¡¡are¡¡a¡¡power¡¡function¡¡of¡¡the¡¡actual¡¡stimulus¡¡magnitude¡£¡¡
1957¡¡Leo¡¡Hurvich¡¡and¡¡Dorothea¡¡Jameson£»¡¡building¡¡on¡¡the¡¡work¡¡of¡¡Ewald¡¡Hering£»¡¡postulated¡¡
the¡¡theory¡¡that¡¡color¡¡vision¡¡is¡¡based¡¡on¡¡opposing¡¡neural¡¡processes£»¡¡the¡¡opponent¡process¡¡
theory¡¡of¡¡color¡¡vision¡£¡¡
1959¡¡David¡¡Hubel¡¡and¡¡Torsten¡¡Wiesel¡¡discovered¡¡that¡¡cells¡¡in¡¡the¡¡visual¡¡cortex¡¡of¡¡cats¡¡£¨and£»¡¡in¡¡
1968£»¡¡of¡¡monkeys£©¡¡respond¡¡differentially¡¡to¡¡form¡¡and¡¡movement¡£¡¡
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