PS260 Lecture Notes - Bigram, Agnosia, Word Lists By Frequency
Document Summary
Class 3, lecture 5, chapter 3: recognizing objects. Mcclelland and rumelhart s (1981) model of word recognition included two additions: excitatory and inhibitory connections between detectors. Inhibitory connects occur if one letter is detected it might excite letters that are common in the bigram for it and inhibit those that are not. Certain letter combinations are more commonly seen: top-down connections from words to letters and letters to features. Once the features of a letter are presented, the features not included are ignored. You can have activation going to from the word level to the letter level to the feature level. This is the reason why we can read text where the words are jumbled, es are changed to 3s, upside down text. Similar feature nets may underlie our perception of objects. The object-superiority effect is analogous to the word-superiority effect.
