PSYC 2650 Lecture Notes - Inferior Frontal Gyrus, Neuroplasticity, Cerebellum
9 Dec 2013
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Document Summary
The results of the zaps experiment replicate the basic word superiority finding. Zaps feature net stimulation and the interpretation of the zaps word superiority results. Reisberg"s feature net model and the zaps feature net stimulation. Words are more likely than single letters to activate bigram detectors. A letter is better recognized in a word because it receives more overall activation weak bigram activation. Letter recognition when letter displayed alone= feature + letter activation + letter + strong bigram activation. Letter recognition when letter displayed in the context of a word= feature + Bottom-up: activation from the most primitive units (features) to higher order units (letters, bigrams, words) in the pattern recognition hierarchy. Top-down: activation flows from complex, higher order units in the pattern recognition hierarchy (words) to lower order units (bigrams, letters, features) Alternative models of the word superiority effect feature net vs interactive activation. The reisberg"s feature net model and the zaps feature net simulation involve bottom-up processing.
