| Investigating the status of biological stimuli as objects of attention in multiple object tracking. | |
| | |
MedLine Citation:
|
PMID: 21483844 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
BACKGROUND: Humans are able to track multiple simultaneously moving objects. A number of factors have been identified that can influence the ease with which objects can be attended and tracked. Here, we explored the possibility that object tracking abilities may be specialized for tracking biological targets such as people. METHODOLOGY/PRINCIPAL FINDINGS: We used the Multiple Object Tracking (MOT) paradigm to explore whether the high-level biological status of the targets affects the efficiency of attentional selection and tracking. In Experiment 1, we assessed the tracking of point-light biological motion figures. As controls, we used either the same stimuli or point-light letters, presented in upright, inverted or scrambled configurations. While scrambling significantly affected performance for both letters and point-light figures, there was an effect of inversion restricted to biological motion, inverted figures being harder to track. In Experiment 2, we found that tracking performance was equivalent for natural point-light walkers and 'moon-walkers', whose implied direction was incongruent with their actual direction of motion. In Experiment 3, we found higher tracking accuracy for inverted faces compared with upright faces. Thus, there was a double dissociation between inversion effects for biological motion and faces, with no inversion effect for our non-biological stimuli (letters, houses). CONCLUSIONS/SIGNIFICANCE: MOT is sensitive to some, but not all naturalistic aspects of biological stimuli. There does not appear to be a highly specialized role for tracking people. However, MOT appears constrained by principles of object segmentation and grouping, where effectively grouped, coherent objects, but not necessarily biological objects, are tracked most successfully. |
| | |
Authors:
|
Lee H de-Wit; Carmen E Lefevre; Robert W Kentridge; Geraint Rees; Ayse P Saygin |
Related Documents
:
|
10947234 - Pattern vision of the honeybee (apis mellifera). what is an oriented edge? 2824714 - Segregation of form, color, and stereopsis in primate area 18. 15137584 - Artificial scotoma-induced perceptual distortions are orientation dependent and short l... 20472034 - The effects of aging on the strength of surround suppression of receptive field of v1 c... 9893854 - Flicker cone electroretinogram in dichromats and trichromats. 10937624 - Simultaneous changes in the mechanical properties, quantitative collagen organization, ... |
Publication Detail:
|
Type: Journal Article Date: 2011-03-31 |
Journal Detail:
|
Title: PloS one Volume: 6 ISSN: 1932-6203 ISO Abbreviation: PLoS ONE Publication Date: 2011 |
Date Detail:
|
Created Date: 2011-04-12 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 101285081 Medline TA: PLoS One Country: United States |
Other Details:
|
Languages: eng Pagination: e16232 Citation Subset: IM |
Affiliation:
|
University of Leuven, Leuven, Belgium. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Transmission of Avian Influenza A Viruses among Species in an Artificial Barnyard.
Next Document: Genome-wide association study identifies genetic Loci associated with iron deficiency.