Visual Information-Processing in the Perception of Features and Objects
Abstract
The research explored varios aspects of visual processing in the perception of features and objects. Studies of visual features tested the level of abstraction of the coding of orientation, the emergence of features in surface media defined by texture, motion or depth, and the role of similarity in preattentive representation of coarsely coded values. Object perception was explored in a series of studies requiring subjects to conjoin features, and testing the role played by spatially selective attention. The results suggested a modification of feature integration theory, allowing some preattentive control through feature maps. We also found evidence for object-specific tokens in the coding of dynamic displays of moving, changing objects. In studies of perceptual learning, extended practice effects were shown to be very specific to details of the practice situation. Finally, visual memory for arbitrary line patterns showed both surprising plasticity )long-lasting traces after a single presentation of 50 patterns) and surprising dissociations between implicit and explicit tests. (js)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 10, 1990
- Accession Number
- ADA230488
Entities
People
- Anne Treisman
Organizations
- University of California, Berkeley