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Visual cueing task. At the beginning of each trial, one of the 4 peripheral rectangular frames became black and thicker. Following a SOA of either 40 or 600 ms, the target appeared in one of the 4 locations (25% probability at each location). The target was a Gabor patch oriented ±45° relative to vertical. Subjects indicated target orientation as quickly and accurately as they could by pressing one of 2 buttons.
