Object appearance,disappearance, and attention prioritization in real-world scenes |
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Authors: | Email author" target="_blank">James?R?BrockmoleEmail author John?M?Henderson |
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Institution: | Michigan State University, East Lansing, USA. james.brockmole@ed.ac.uk |
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Abstract: | We examined the prioritization of abruptly appearing and disappearing objects in real-world scenes. These scene changes occurred
either during a fixation (transient appearance/disappearance) or during a saccade (nontransient appearance/disappearance).
Prioritization was measured by the eyes’ propensity to be directed to the region of the scene change. Object additions and
deletions were fixated at rates greater than chance, suggesting that both types of scene change are cues used by the visual
system to guide attention during scene exploration, although appearances were fixated twice as often as disappearances, indicating
that new objects are more salient than deleted objects. New and deleted objects were prioritized sooner and more frequently
if they occurred during a fixation, as compared with during a saccade, indicating an important role of the transient signal
that often accompanies sudden changes in scenes. New objects were prioritized regardless of whether they appeared during a
fixation or a saccade, whereas prioritization of a deleted object occurred only if (1) a transient signal was present or (2)
the removal of the object revealed previously occluded objects. |
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Keywords: | |
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