9 lecture_nov25

9 lecture_nov25 - IAC What does IAC let you talk about? o o...

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IAC What does IAC let you talk about? o Decay? Returns to resting level if nothing excites it o Boundaries – floors and ceilings wherein activation falls o Equilibrium state – point towards which network is moving o Competition – tendency for units connected to each other by negative weights to turn each other off o Resonance – tendency for units connected by positive weights to keep each other active o Blocking and hysteresis – ability of an active unit to slow down or entirely block a unit to which it is connected by a negative weight o Oscillation – ability to turn on and off in consecutive time-steps instead of settling into a stable state Constraint satisfaction model of ‘Necker Cube’ Word superiority effect has been modeled using IAC o When just a single letter presented, the only thing that activates in the memory is the letter detector. But when stimulus is word, lots more connections since all letter detectors come into play (for each word) and the feature detector and so many
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9 lecture_nov25 - IAC What does IAC let you talk about? o o...

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