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Visual marking: a convergence of goal- and stimulus-driven processes during visual search
Paul Atchley1, Sybil E Jones, Lesa Hoffman
1Department of Psychology, University of Kansas, Lawrence, Kansas 66045-2160, USA. patchley@ku.edu
Perception & Psychophysics
|September 6, 2003
Summary
Visual marking aids visual search by inhibiting old items, but only when targets appear in new locations and new items have distinct features. This attentional selection benefits search under specific goal-directed conditions.
Area of Science:
- Cognitive Psychology
- Visual Perception
- Attention Studies
Background:
- Visual marking, proposed by Watson and Humphreys (1997), is theorized as a goal-directed process enhancing visual search via inhibition of previously viewed items.
- Understanding the precise conditions under which visual marking benefits search performance is crucial for cognitive models of attention.
Purpose of the Study:
- To investigate the role of target location (old vs. new) and object onset salience in visual marking.
- To determine if visual marking acts as an attentional selection mechanism and identify its necessary conditions.
Main Methods:
- Experiment 1 varied target locations (always old, always new, mixed) to assess marking effects.
- Experiment 2 employed an offset paradigm to isolate the contribution of abrupt onsets in new objects, removing their salience.
Main Results:
- Visual marking benefits were observed when targets appeared in new locations.
- Performance at old locations was unaffected when targets were consistently old but impaired when targets varied between old and new locations.
- No significant marking benefits were found for targets at new locations when the salient abrupt-onset feature of new objects was absent.
Conclusions:
- Visual marking appears to be an attentional selection mechanism that enhances visual search.
- Effective visual marking requires an appropriate search goal, the inhibition of old objects, and the presence of salient perceptual features in new objects.
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