Visual Perception of Features and Objects
Abstract
This period of grant support was used to continue experiments on the preattentive processing of features, focusing on the role of attention in the integration of information across opposite directions of contrast. While unicontrast dots can be integrated in parallel across space and time to give rise to preattentive perception of either orientation or motion, attention seems to be required when the dots are of opposite contrast, consistent with the predictions of feature integration theory. A new method of dissociating preattentive and attentive processing through selective adaptation was explored. The second main area of research concerned perception and visual memory for novel objects, using priming tasks to discover the nature of the representations formed either automatically or with attention. We discovered a surprising combination of plasticity and persistence in implicit memory: Unattended novel patterns apparently leave memory traces that are formed in a single presentation but persist across at least 200 intervening trials with other similar patterns. Yet no conscious explicit memory is available even immediately after the presentation. Features, Objects, Attention, Vision.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 19, 1993
- Accession Number
- ADA269879
Entities
People
- Anne Treisman
Organizations
- University of California, Berkeley