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Sequence of events in a trial of Experiment 4. The top row illustrates an SO-absent trial. The middle row illustrates a trial in which the secondary object was present but no target dot appeared. The bottom row illustrates a SO-present trial on which a target dot appeared. When a target dot appeared, it was presented at the object location on 73.3% of trials (valid) and on the opposite side of the screen on 26.7% of trials (invalid).
