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  Changes in Saccadic Latencies Due to Distractive Information : An Analysis Based on Latency Distributions

Gulan, S., Seymour, K., & Ilg, U. (2005). Changes in Saccadic Latencies Due to Distractive Information: An Analysis Based on Latency Distributions. Poster presented at 8th Tübinger Wahrnehmungskonferenz (TWK 2005), Tübingen, Germany.

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 Creators:
Gulan, S, Author
Seymour, K1, Author              
Ilg , UJ, Author
Affiliations:
1External Organizations, ou_persistent22              

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 Abstract: It was previously shown that saccadic latency in humans can be increased by sudden changes in luminance or orientation of a structured background. This result was led back to the limited capacity of channels in the visuomotor pathway. We expand this finding in a series of studies from a rather qualitative to a more quantitative result : The intervall in which a distraction is possible is refined to lie below 14 ms SOA. Next we seek to incorporate a measure of the strength of a distracting stimulus the increase in saccadic latency is functionally dependant on the amount of change in background luminance. The findings from the experiments will also be examined from the viewpoint of the LATER-model which allows a distinction between different possible cases of latency changes based on latency distributions. In our case it points to a difference in available visual information due to different background changes. As eye and hand movement commands partly share a common pathway, i.e. the superior colliculus, we also repeat the amentioned experiment with combined eye and hand movements. The result that the latency of hand movements underlies the same functional dependance on sudden background changes further strengthens the relation between goal-oriented behaviour by these two kinds of actions. These results indicate that information from luminance-changes is an important factor for the building of saliency maps, since it cannot be deliberately suppressed at critical times which demand fast and top-down modulated responses.

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 Dates: 2005-02
 Publication Status: Published in print
 Pages: -
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Title: 8th Tübinger Wahrnehmungskonferenz (TWK 2005)
Place of Event: Tübingen, Germany
Start-/End Date: 2005-02-25 - 2005-02-27

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Title: 8th Tübingen Perception Conference: TWK 2005
Source Genre: Proceedings
 Creator(s):
Bülthoff, HH1, Editor            
Mallot, HA, Author            
Ulrich, R, Author
Wichmann, FA1, Author            
Affiliations:
1 Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794            
Publ. Info: Kircentellinsfurt, Germany : Knirsch
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 81 Identifier: ISBN: 3-927091-70-7