The interactive activation model created by Rumelhart & McClelland (1982) describes how perception of words results from excitatory and inhibitory interactions of detectors for visual features, letters and words.
- A visual input excites detectors for visual features in the display.These excite detectors for letters consistent with the active features.
- The letter detectors in turn excite detectors for consistent words.
- Active word detectors mutually inhibit each other and send feedback to the letter level, strengthening activation and hence perceptibility of their constituent letters.
The model also produces facillitation for letters in pronouncable pseudowords as well as words. Pseudowords activate detectors for words that are consistent with most of the active letters, and feedback from the activated words strengthens the activations of letters in the pseudoword.
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