Tracking Multiple Items Through Occlusion: Clues to Visual Objecthood


Authors
Zenon Pylyshyn
Rutgers University - New Brunswick
Abstract
In three experiments, subjects attempted to track multiple items as they moved independently and unpredictably about a display. Performance was not impaired when the items were briefly (but completely) occluded at various times during their motion, suggesting that occlusion is taken into account when computing enduring perceptual objecthood. Unimpaired performance required the presence of accretion and deletion cues along fixed contours at the occluding boundaries. Performance was impaired when items were present on the visual field at the same times and to the same degrees as in the occlusion conditions, but disappeared and reappeared in ways which did not implicate the presence of occluding surfaces (e.g. by imploding and exploding into and out of existence, instead of accreting and deleting along a fixed contour). Unimpaired performance did not require visible occluders (i.e. Michotte’s tunnel effect) or globally consistent occluder positions. We discuss implications of these results for theories of objecthood in visual attention.
Keywords No keywords specified (fix it)
Categories (categorize this paper)
Options
Edit this record
Mark as duplicate
Export citation
Find it on Scholar
Request removal from index
Translate to english
Revision history

Download options

Our Archive


Upload a copy of this paper     Check publisher's policy     Papers currently archived: 39,692
External links

Setup an account with your affiliations in order to access resources via your University's proxy server
Configure custom proxy (use this if your affiliation does not provide a proxy)
Through your library

References found in this work BETA

No references found.

Add more references

Citations of this work BETA

Core Systems of Number.Stanislas Dehaene, Elizabeth Spelke & Lisa Feigenson - 2004 - Trends in Cognitive Sciences 8 (7):307-314.
Object Persistence in Philosophy and Psychology.Brian J. Scholl - 2007 - Mind and Language 22 (5):563–591.

View all 41 citations / Add more citations

Similar books and articles

Occlusion Shapes and Sizes in a Theory of Depiction.Anthony A. Derksen - 2004 - British Journal of Aesthetics 44 (4):319-341.
Blindsight.Basileios Kroustallis - 2005 - Philosophical Psychology 18 (1):31-43.

Analytics

Added to PP index
2010-12-22

Total views
33 ( #230,609 of 2,328,129 )

Recent downloads (6 months)
1 ( #950,624 of 2,328,129 )

How can I increase my downloads?

Downloads

My notes

Sign in to use this feature