KOPS - Das Institutionelle Repositorium der Universität Konstanz

Funktionelle Gehirnasymmetrien für die Integration von Ebene und Form bei hierarchischen visuellen Reizen

Funktionelle Gehirnasymmetrien für die Integration von Ebene und Form bei hierarchischen visuellen Reizen

Zitieren

Dateien zu dieser Ressource

Prüfsumme: MD5:52a3e35653db5219291bed7590dbcdfc

VOLBERG, Gregor, 2004. Funktionelle Gehirnasymmetrien für die Integration von Ebene und Form bei hierarchischen visuellen Reizen

@phdthesis{Volberg2004Funkt-11285, title={Funktionelle Gehirnasymmetrien für die Integration von Ebene und Form bei hierarchischen visuellen Reizen}, year={2004}, author={Volberg, Gregor}, address={Konstanz}, school={Universität Konstanz} }

Volberg, Gregor Functional hemispheric asymmetries for the integration of level and form of hierarchical viusal stimuli It is generally assumed that the local and global levels of hierarchically structured visual stimuli are processed with a higher efficiency in the left and right cerebral hemispheres, respectively. However, the specific conditions under which the hemispheric difference shows up, as well as the underlying mechanisms for this effect, are yet largely unknown.<br />In order to attain a better understanding of these mechanisms, one ERP study (study I) and two response time studies (studies II and III) with hierarchically structured letters were conducted. The task was to identify a form on a pre-specified level (studies I and II) or to categorize a pre-specified form on either level of the stimulus (study III).<br />In the first two studies hemispheric differences only occurred if the forms on the levels of the same stimulus produced a response conflict. As an explanation, it was assumed that the forms are represented independently of their levels on early stages of processing, and that the hemispheres only differ with respect to the later integration of these information. Accordingly, hemispheric differences mainly show up with conflicting stimuli, where a highly elaborated (i.e., integrated) representation is needed for the response selection. In line with this interpretation, the results of study III showed a positive relation between the response times and the associated hemispheric differences: Fast responses by means of early form representations led to less hemispheric differences than slower responses based upon later, integrated representations.<br />Thus, the results of all three studies support the assumption that the hemispheres differ with respect to the integration of level and form of hierarchically structured stimuli: The left hemisphere has an advantage for the integration of forms with the local level, and the right hemisphere has a higher capacity for integrating forms with the global level. deposit-license application/pdf 2004 deu 2011-03-25T09:27:20Z 2011-03-25T09:27:20Z Funktionelle Gehirnasymmetrien für die Integration von Ebene und Form bei hierarchischen visuellen Reizen Volberg, Gregor

Dateiabrufe seit 01.10.2014 (Informationen über die Zugriffsstatistik)

Volberg_04_Dissertation_Upload_komp.pdf 166

Das Dokument erscheint in:

KOPS Suche


Stöbern

Mein Benutzerkonto