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bottom-up processing

noun

a processing technique, either in the brain or in a computer, in which incoming information is analysed in successive steps and later-stage processing does not affect processing in earlier stages
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012