Carolina Murd "Mechanisms of processing visual motion information: Psychophysical, bioelectrical and transcranial magnetic stimulation investigations" | University of Tartu

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Contacts of UT units

Faculty of Arts and Humanities
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Faculty address: 
Jakobi 2, rooms 116–121, 51005 Tartu
  • Dean's Office
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    Jakobi 2, rooms 116–121, 51005 Tartu
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    Jakobi 2, 51005 Tartu
  • Institute of Estonian and General Linguistics
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    Jakobi 2, 51005 Tartu
  • Institute of Philosophy and Semiotics
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    Jakobi 2, rooms 309–352, 51005 Tartu
  • Institute of Cultural Research
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    Ülikooli 16, 51003 Tartu
  • School of Theology and Religious Studies
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    +372 737 5301
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    Ülikooli 18–310, 50090 Tartu
  • College of Foreign Languages and Cultures
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    J. Liivi 4, 50409, Tartu
  • Viljandi Culture Academy
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    +372 435 5232
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    Posti 1, 71004 Viljandi
Faculty of Social Sciences
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Lossi 36, 51003 Tartu
  • Dean's Office
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  • Institute of Education
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  • Johan Skytte Institute of Political Studies
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  • School of Economics and Business Administration
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  • Institute of Psychology
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  • Estonian Marine Institute
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  • Institute of Physics
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  • Tartu Observatory
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  • Institute of Technology
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    W. Struve 1, 50091 Tartu
  • Youth Academy
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    Uppsala 10, 51003 Tartu
  • Institute of Genomics
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    Riia 23b, 51010 Tartu
  • Museum
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  • University of Tartu Natural History Museum and Botanical Garden
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    Faculty address: 
    Narva mnt 18, 51009, Tartu
  • University Office in Tallinn
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    Faculty address: 
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  • Estates Office
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Carolina Murd "Mechanisms of processing visual motion information: Psychophysical, bioelectrical and transcranial magnetic stimulation investigations"

Date: 
25.02.2014 - 12:15 to 13:45

On 25 February Carolina Murd will defence her doctoral thesis "Mechanisms of processing visual motion information: Psychophysical, bioelectrical and transcranial magnetic stimulation investigations" in the Council of the Faculty of the Social Sciences and Education.

Supervisors:
Professor Talis Bachmann, University of Tartu
Senior Researcher Kairi Kreegipuu, University of Tartu

Opponent:
Professor Jochen Müsseler, RWTH Aachen University, Germany

Summary:
Motion perception is one of the most important functions of our visual system, enabling us to adapt and survive in the frequently changing environment. The mechanisms processing and using motion information are quite complex and often influenced by motivational aspects such as attention. The present doctoral dissertation deals with three main topics that are related to motion perception. First, it is examined how people perceive moving objects in comparison to stationary ones and whether a new experimental design with two objects moving in opposite direction reveals new information about the flash-lag effect. Second, it is observed, by using different task setups and measuring the bioelectrical activity of the brain, how and in which conditions does the presence of motion influence colour change perception in the moving object. Third part of the dissertation is dedicated to motion after-effect and how it is influenced by selective attention and brain stimulation. The main results found were as follows: 1) when people are presented with two objects moving in opposite direction and one of them has to be compared with briefly presented stationary flash, the mislocalization of the moving object it greater, 2) motion enhances the detection of the colour change in the moving object, but this enhancing effect is both task- and object-specific and not reflected in the bioelectrical activity of the brain, 3) both selective attention and brain stimulation influence the perceived duration of motion after-effect, but the direction of these influences depends on the experimental instruction and on the temporal characteristics of attending. In summary, motion perception is an integrative process that is based on different psychological and neurophysiological processes. The present dissertation has contributed to investigating these processes.

Organizer: 
Location: 
UT Senate Hall
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