Projektleiter

Betty Mohler, PhD
Tel: 07071 601-217
Fax: 07071 601-616
betty.mohler[at]tuebingen.mpg.de
 
Martin Dobricki, Dr. Phil.
Tel: 07071 601-215
Fax: 07071 601-616
Opens window for sending emailmartin.dobricki[at]tuebingen.mpg.de
 

PAVE-Poster


Neuigkeiten

 
 
 

Aktuellste Veröffentlichungen

Köhler R, Hirsch M, Mohler B, Schölkopf B und Harmeling S (Oktober-2012) Recording and Playback of Camera Shake: Benchmarking Blind Deconvolution with a Real-World Database In: Computer Vision – ECCV 2012, , 12th European Conference on Computer Vision, Springer, Berlin, Germany, 27-40, Series: Lecture Notes in Computer Science ; 7578.
Mohler BJ, Di Luca M und Bülthoff HH: Multisensory contributions to spatial perception, 81-97. In: Handbook of Spatial Cognition, (Ed) D. Waller, American Psychological Association, Washington, DC, USA, (Oktober-2012).
Dobricki M, Mohler BJ und Bülthoff HH (September-7-2012) Abstract Talk: The ownership of a virtual body induced by visuo-tactile stimulation indicates the alteration of self-boundaries, Fifth International Conference on Spatial Cognition (ICSC 2012), Roma, Italy, Cognitive Processing, 13(Supplement 1) S18.
Bieg H-J, Bresciani J-P, Bülthoff HH und Chuang LL (September-2012) Looking for Discriminating Is Different from Looking for Looking's Sake PLoS ONE 7(9) 1-9.
Streuber S, Mohler BJ, Bülthoff HH und de la Rosa S (September-2012) The Influence of Visual Information on the Motor Control of Table Tennis Strokes Presence 21(3) 281-294.

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Wahrnehmen und Handeln in virtuellen Umgebungen

Betty Mohler sieht ihren eigenanimierten Avatar in ihrem Head-Mounted Display.
Betty Mohler sieht ihren eigenanimierten Avatar in ihrem Head-Mounted Display.
Ziel der Forschungsgruppe “Wahrnehmen und Handeln in virtuellen Umgebungen” ist die Erforschung menschlicher Wahrnehmung, Kognition und Verhaltens in natürlicher Umgebung. Hierfür bedienen wir uns realitätsgetreuer und mit vielen Sinnen erfahrbarer virtueller Welten (virtual reality, VR). Dies ermöglicht es uns einerseits sensorische Reize in einer kontrollierten Umgebung zu präsentieren als auch sie in einer Art und Weise zu verändern wie das in der realen Welt nicht möglich wäre.

Im Speziellen ermöglicht unsere hochmoderne VR-Technologie den sichtbaren Körper, den Inhalt der virtuellen Welt sowie sensorische Reize (visuell, vestibulär, kinästhetisch, taktil und auditorisch) während dem Wahrnehmen oder Handeln zu verändern. Unsere Forschungsgruppe konzentriert sich auf verschiedene Forschungsfragen, bezieht sich jedoch immer auf die Messung menschlicher Leistungsfähigkeit in komplexen, alltäglichen Situationen, z.B. beim Gehen, Fahren, Kommunizieren oder während der räumlichen Orientierung. Wir untersuchen die Auswirkung eines animierten, den Nutzer repräsentierenden Avatars auf die räumliche Wahrnehmung, die Kommunikation oder das Gefühl einen bzw. einen bestimmten Körper zu haben. Wir interessieren uns dafür, wie sich andere Avatare auf Leistung, Emotions-Wahrnehmung, Lernen und Training sowie die visuelle und körperliche Kontrolle von Fortbewegungsprozessen auswirkt. Außerdem erforschen wir wie sich Menschen in alltäglichen Umwelten wie Gebäuden oder Städten orientieren und wie sie diese im Gedächtnis repräsentieren. Zusammengefasst arbeitet unsere Forschungsgruppe daran, menschliches Verhalten, Wahrnehmung und Kognition komplexer Alltagsprozesse besser zu verstehen. Dazu nutzen und verbessern wir modernste VR-Technologien.

Main research areas

Visual body influences perception:
Seeing a virtual avatar in the virtual environment influences egocentric distance estimates. If this avatar is a self-animated avatar, egocentric distances are even more influenced (Mohler, Presence, 2010).  Eye-height influences egocentric space and dimension estimates in virtual environments (Leyrer, APGV 2011).  Seeing a virtual character (self or other) impacts subsequent performance of common tasks in virtual environments (McManus, supervised by Mohler, APGV 2011).  The size of visual body parts (hands/arm length) influences size and distance estimates in virtual worlds (Linkenauger, ECVP and VSS 2011).  These results taken together argue that the body plays a central role in the perception of our surrounding environment.
 
The role of visual body information in human interaction and communication:
Current state-of-the-art in motion capture tracking enables scientists to animate avatars with multiple participant’s body motion in real time. We have used this technology to conduct experiments investigating the role of body language on successful communication and interaction. We have found that body language is important for successful communication in a word-communication task and that both the speaker’s and the listener’s body movements (as seen through animated avatars) impacts communication (Dodds, CASA, 2010).  We have further shown that people move more if they are wearing the xSens Moven suits and using large-screen projection technology as compared to when they are wearing Vicon rigid body tracking objects and viewing the virtual world in a low field-of-view head-mounted display (Dodds, PLoS One 2011). We have also investigated the role of the visual information of the interaction partner on task performance in a table-tennis paradigm. We have shown that the social context (competitive or cooperative) mediates the use of visual information about the interaction partner (Streuber, EBR 2011). We have also used motion capture technology to investigate the use of VR for medical training (Alexandrova CASA, 2011) and the emotional expression of body language (Volkova, IMRF, 2011).
 
Self-motion perception while walking and reaching:
We have conducted studies to investigate the sensory contribution to encoding walking velocity (visual, vestibular, proprioceptive, efferent copy) and have found a new measure for self-motion perception: active pointing trajectory (Campos, PLoS One, 2009). We have further demonstrated that imagined walking is different than physical walking, in that participants point in a way that indicates that they are not simulating all of their sensory information for walking when imagining walking. Additionally, we have investigated human’s ability to detect when they are walking on a curved path and the influence of walking speed on curvature sensitivity. We have found that walking speed does influence curvature sensitivity, showing that when walking at a slower velocity people are less sensitive to walking on a curve. We exploit this perceptual knowledge and designed a dynamic gain controller for redirected walking, which enables participants to walk unaided in a virtual city (Neth, IEEE-VR 2011).  Finally, we have investigated motor learning in for reaching given different viewpoints and different visual realism of the arm and environment and make suggestions for the use of VR for rehabilitation and motor-learning experiments (Shomaker, Tesch, Buelthoff & Bresciani, EBR 2011).
 
Spatial perception and cognition:
Visiting Prof. Roy Ruddle investigated the role of body-based information on spatial navigation. He found that walking improves humans cognitive map in large virtual worlds (Ruddle, ToCHI 2011) and he investigated the role of body-based information and landmarks on route knowledge (Ruddle, Memory & Cognition 2011).  We have also found that pointing to locations within one’s city of residence relies on a single north-oriented reference frame likely learned from maps [Frankenstein, PsychScience in press]. Without maps available navigators primarily memorize a novel space as local interconnected reference frames corresponding to a corridor or street [Meilinger 2010 and Hensen, supervised by Meilinger 2011 Cog Sci,]. Consistent with these results, entorhinal grid cells in humans quickly remap their grid orientation after changing the surrounding environment (Pape, supervised by Melinger SfN 2011). Additionally, we have found that egocentric distance estimates are also underestimated in large screen displays, and are influenced by the distance to the screen (Alexandrova, APGV 2010).

Selected Publications

142. Pretto P, Ogier M, Bülthoff HH und Bresciani J-P (April-2009) Influence of the size of the field of view on motion perception Computers and Graphics 33(2) 139-146.
CiteID: 5694
141. Dodds TJ und Ruddle RA (April-2009) Using mobile group dynamics and virtual time to improve teamwork in large-scale collaborative virtual environments Computers & Graphics 33(2) 130-138.
pdfCiteID: 6094
140. Streuber S, de la Rosa S, Trutoiu LC, Bülthoff HH und Mohler B (April-2009) Does Brief Exposure to a Self-avatar Affect Common Human Behaviors in Immersive Virtual Environments? In: Eurographics 2009, , 30th Annual Conference of the European Association for Computer Graphics, European Association for Computer Graphics, Geneve, Switzerland, 33-36.
pdfCiteID: 5818
139. Trutoiu LC, Mohler BJ, Schulte-Pelkum J und Bülthoff HH (Februar-2009) Circular, linear, and curvilinear vection in a large-screen virtual environment with floor projection Computers and Graphics 33(1) 47-58.
CiteID: 5583
138. Volkova E (Februar-2009) Experiment for the color idioms project Slovo i Tekst 9 157-164.
CiteID: 6952
137. Witt JK, Linkenauger SA, Bakdash JZ, Augustyn JA, Cook A und Proffitt DR (Januar-2009) The long road of pain: chronic pain increases perceived distance Experimental Brain Research 192(1) 145-148.
CiteID: WittLBACP2009
136.
Dobricki M.: Kinder der Relativität: Humanexperimentelle Untersuchungen zu Modulationen visueller Strukturen, 148, Südwestdeutscher Verlag für Hochschulschriften, Saarbrücken, Germany, (2009). ISBN: 978-3-8381-0527-7
CiteID: Dobricki2009
135. Dobricki M: Sensorische Deprivation, 175. In: Pschyrembel Psychiatrie, Klinische Psychologie, Psychotherapie, (Ed) J. Margraf, de Gruyter, Berlin, Germany, (2009).
CiteID: Dobricki2009_2
134. Dobricki M: Veränderter Wachbewusstseinszustand, 887. In: Pschyrembel Psychiatrie, Klinische Psychologie, Psychotherapie, (Ed) J. Margraf, de Gruyter, Berlin, Germany, (2009).
CiteID: Dobricki2009_3
133. Meilinger T und Knauff M (Dezember-2008) Ask for Directions or Use a Map: a Field Experiment on Spatial Orientation and Wayfinding in an Urban Environment Journal of Spatial Science 53(2) 13-23.
pdfCiteID: 3857
132. Volkova E (Oktober-2008) Idioms with basic color terms in the English and Russian languages Vestnik Tverskogo Gosudarstvennogo Universiteta 17(13) 202-213.
CiteID: 6954
131. Engel D, Curio C, Tcheang L, Mohler B und Bülthoff HH (Oktober-2008) A psychophysically calibrated controller for navigating through large environments in a limited free-walking space, 15th ACM Symposium on Virtual Reality Software and Technology (VRST 2008), ACM Press, New York, NY, USA, 157-164.
pdfCiteID: 5323
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Last updated: Montag, 01.09.2014