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Saccade reaction time asymmetries during task-switching in pursuit tracking

Authors
Bieg, Hans-JoachimBresciani, Jean-PierreBuelthoff, Heinrich H.Chuang, Lewis L.
Issue Date
10월-2013
Publisher
SPRINGER
Keywords
Eye movements; Saccades; Reaction time; Pursuit tracking; Smooth pursuit; Distraction; Attention; Task-switching
Citation
EXPERIMENTAL BRAIN RESEARCH, v.230, no.3, pp.271 - 281
Indexed
SCIE
SCOPUS
Journal Title
EXPERIMENTAL BRAIN RESEARCH
Volume
230
Number
3
Start Page
271
End Page
281
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/102099
DOI
10.1007/s00221-013-3651-9
ISSN
0014-4819
Abstract
We investigate how smooth pursuit eye movements affect the latencies of task-switching saccades. Participants had to alternate their foveal vision between a continuous pursuit task in the display center and a discrete object discrimination task in the periphery. The pursuit task was either carried out by following the target with the eyes only (ocular) or by steering an on-screen cursor with a joystick (oculomanual). We measured participants' saccadic reaction times (SRTs) when foveal vision was shifted from the pursuit task to the discrimination task and back to the pursuit task. Our results show asymmetries in SRTs depending on the movement direction of the pursuit target: SRTs were generally shorter in the direction of pursuit. Specifically, SRTs from the pursuit target were shorter when the discrimination object appeared in the motion direction. SRTs to pursuit were shorter when the pursuit target moved away from the current fixation location. This result was independent of the type of smooth pursuit behavior that was performed by participants (ocular/oculomanual). The effects are discussed in regard to asymmetries in attention and processes that suppress saccades at the onset of pursuit.
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