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There are two outstanding questions concerning FINST's and eye movements:
There is the question of how the indexing of scene objects can be sustained despite eye movements. If index binding can survive eye movements then indexes can continue to individuate and track scene objects over saccades. If that were the case, indexes are in a position to play a critical role in the perception of a stable and continuous world across saccades by serving as the means for establishing a correspondence between fixation
If we can show that FINST's do survive a saccade, we can then ask what is the basis of the maintenance of visual indices across saccades.
We are currently employing a paradigm called "Subset Selection" in order to investigate these two questions