Keeping track of multiple visually identical and independently moving objects is a remarkable feature of the human visual system. Theoretical accounts for this ability focus on resource-based models that describe parametric decreases of performance with increasing demands during the task (i.e., more relevant items, closer distances, higher speed). Additionally, the presence of two central tracking resources, one within each hemisphere, has been proposed, allowing for an independent maintenance of moving targets within each visual hemifield. Behavioral evidence in favor of such a model shows that human subjects are able to track almost twice as many targets across both hemifields compared with within one hemifield. A number of recent publications argue for two separate and parallel tracking mechanisms during standard object tracking tasks that allow for the maintenance of the relevant information in a location-based and object-based manner. Unique electrophysiological correlates for each of those processes have been identified. The current study shows that these electrophysiological components are differentially present during tracking within either the left or right hemifield. The present results suggest that targets are mostly maintained as an object-based representation during left hemifield tracking, while location-based resources are preferentially engaged during right hemifield tracking. Interestingly, the manner of representation does not seem to have an impact on behavioral performance within the subjects, while the electrophysiological component indicating object-based tracking does correlate with performance between subjects. We propose that hemifield independence during multiple-object tracking may be an indication of the underlying hemispheric bias for parallel location-based and object-based tracking mechanisms.
机构:
Univ Maryland, Dept Psychol, College Pk, MD 20742 USAUniv Maryland, Dept Psychol, College Pk, MD 20742 USA
McMenamin, Brenton W.
Deason, Rebecca G.
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Texas State Univ, Dept Psychol, San Marcos, TX USAUniv Maryland, Dept Psychol, College Pk, MD 20742 USA
Deason, Rebecca G.
Steele, Vaughn R.
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Univ New Mexico, Lovelace Biomed & Environm Res Inst, Mind Res Network, Albuquerque, NM 87131 USAUniv Maryland, Dept Psychol, College Pk, MD 20742 USA
机构:
Otto von Guericke Univ, D-39120 Magdeburg, Germany
Leibniz Inst Neurobiol, Magdeburg, GermanyOtto von Guericke Univ, D-39120 Magdeburg, Germany
Heinze, Hans-Jochen
Hopf, Jens-Max
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Otto von Guericke Univ, D-39120 Magdeburg, Germany
Leibniz Inst Neurobiol, Magdeburg, GermanyOtto von Guericke Univ, D-39120 Magdeburg, Germany
Hopf, Jens-Max
Schoenfeld, Mircea Ariel
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Otto von Guericke Univ, D-39120 Magdeburg, Germany
Leibniz Inst Neurobiol, Magdeburg, Germany
Univ Calif San Diego, San Diego, CA 92103 USAOtto von Guericke Univ, D-39120 Magdeburg, Germany
机构:
Univ Maryland, Dept Psychol, College Pk, MD 20742 USAUniv Maryland, Dept Psychol, College Pk, MD 20742 USA
McMenamin, Brenton W.
Deason, Rebecca G.
论文数: 0引用数: 0
h-index: 0
机构:
Texas State Univ, Dept Psychol, San Marcos, TX USAUniv Maryland, Dept Psychol, College Pk, MD 20742 USA
Deason, Rebecca G.
Steele, Vaughn R.
论文数: 0引用数: 0
h-index: 0
机构:
Univ New Mexico, Lovelace Biomed & Environm Res Inst, Mind Res Network, Albuquerque, NM 87131 USAUniv Maryland, Dept Psychol, College Pk, MD 20742 USA
机构:
Otto von Guericke Univ, D-39120 Magdeburg, Germany
Leibniz Inst Neurobiol, Magdeburg, GermanyOtto von Guericke Univ, D-39120 Magdeburg, Germany
Heinze, Hans-Jochen
Hopf, Jens-Max
论文数: 0引用数: 0
h-index: 0
机构:
Otto von Guericke Univ, D-39120 Magdeburg, Germany
Leibniz Inst Neurobiol, Magdeburg, GermanyOtto von Guericke Univ, D-39120 Magdeburg, Germany
Hopf, Jens-Max
Schoenfeld, Mircea Ariel
论文数: 0引用数: 0
h-index: 0
机构:
Otto von Guericke Univ, D-39120 Magdeburg, Germany
Leibniz Inst Neurobiol, Magdeburg, Germany
Univ Calif San Diego, San Diego, CA 92103 USAOtto von Guericke Univ, D-39120 Magdeburg, Germany