Show simple item record

On the difficulty of feature-based attentional modulations in visual object recognition: A modeling study.

dc.date.accessioned2004-10-20T21:05:18Z
dc.date.accessioned2018-11-24T10:23:40Z
dc.date.available2004-10-20T21:05:18Z
dc.date.available2018-11-24T10:23:40Z
dc.date.issued2004-01-14en_US
dc.identifier.urihttp://hdl.handle.net/1721.1/7280
dc.identifier.urihttp://repository.aust.edu.ng/xmlui/handle/1721.1/7280
dc.description.abstractNumerous psychophysical experiments have shown an important role for attentional modulations in vision. Behaviorally, allocation of attention can improve performance in object detection and recognition tasks. At the neural level, attention increases firing rates of neurons in visual cortex whose preferred stimulus is currently attended to. However, it is not yet known how these two phenomena are linked, i.e., how the visual system could be "tuned" in a task-dependent fashion to improve task performance. To answer this question, we performed simulations with the HMAX model of object recognition in cortex [45]. We modulated firing rates of model neurons in accordance with experimental results about effects of feature-based attention on single neurons and measured changes in the model's performance in a variety of object recognition tasks. It turned out that recognition performance could only be improved under very limited circumstances and that attentional influences on the process of object recognition per se tend to display a lack of specificity or raise false alarm rates. These observations lead us to postulate a new role for the observed attention-related neural response modulations.en_US
dc.format.extent38 p.en_US
dc.format.extent4871469 bytes
dc.format.extent1392271 bytes
dc.language.isoen_US
dc.subjectAIen_US
dc.subjectobject recognitionen_US
dc.subjectattentionen_US
dc.subjectvisionen_US
dc.subjectmodelingen_US
dc.titleOn the difficulty of feature-based attentional modulations in visual object recognition: A modeling study.en_US


Files in this item

FilesSizeFormatView
AIM-2004-004.pdf1.392Mbapplication/pdfView/Open
AIM-2004-004.ps4.871Mbapplication/postscriptView/Open

This item appears in the following Collection(s)

Show simple item record