Abstract
There is increasing evidence that it is possible to shift an aperture of focal attention to a position in visual space independent of fixation and that this can be done much faster than the eyes are able to move1–4. Recently, we showed4 that such serial scrutiny by the aperture of focal attention is required before an observer is able to tell what a target is (for example, to know whether the orientation of a line segment is horizontal or vertical). Here we considered whether attention directed towards a specific position in the visual field for an orientation discrimination task improves performance on a simple detection task in the area to which attention is directed. We found that a small test flash could be detected when it was positioned near a peripheral line target presented briefly, if the orientation of the target had to be identified. The test flash could not be detected when presented at some distance from the same target or when another target had to be identified. This enhancement implies that even simple identification tasks such as orientation discrimination are not performed passively by the visual system.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Posner, M. I. Q. J. exp. Psychol. 32, 3–25 (1980).
Treisman, A. & Gelade, G. Cognitive Psychol. 12, 97–136 (1980).
Bergen, J. R. & Julesz, B. Nature 303, 696–698 (1983).
Sagi, D. & Julesz, B. Science 228, 1217–1219 (1985).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Sagi, D., Julesz, B. Enhanced detection in the aperture of focal attention during simple discrimination tasks. Nature 321, 693–695 (1986). https://doi.org/10.1038/321693a0
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1038/321693a0
This article is cited by
-
Influence of stimulus manipulation on conscious awareness of emotional facial expressions in the match-to-sample paradigm
Scientific Reports (2023)
-
Impairment of emotional expression detection after unilateral medial temporal structure resection
Scientific Reports (2021)
-
The size of the attentional window when measured by the pupillary response to light
Scientific Reports (2018)
-
Visual attention spreads broadly but selects information locally
Scientific Reports (2016)
-
Illusion of extent evoked by closed two-dimensional shapes
Biological Cybernetics (2015)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.