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


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Aktuellste Veröffentlichungen

Meilinger T, Franz G und Bülthoff HH (Januar-2012) From Isovists via Mental Representations to Behaviour: First Steps Toward Closing the Causal Chain Environment and Planning B: Planning and Design 39(1) 48-62.
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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

70. Mohler BJ, Creem-Regehr SH und Thompson WB (Juni-2007): Visually mismatched feedback within a head-mounted display affects a perceptual-motor but not a cognitive real world egocentric distance response, 7th Annual Meeting of the Vision Sciences Society (VSS 2007), Sarasota, FL, USA, Journal of Vision, 7(9) 413.
CiteID: 4648
69. Meilinger T, Riecke BE, Berger D und Bülthoff HH: A novel immersive virtual environment setup for behavioural experiments in humans, tested on spatial memory for environmental spaces, 158, Max-Planck-Institute for Biological Cybernetics, Tübingen, Germany, (März-2007).
pdfCiteID: 4490
68. Meilinger T, Brösamle M, Hölscher C, Wilbertz G, Büchner J und Sprenger H (März-2007) Abstract Talk: Wie viel Information brauchen wir? Selbstlokalisation und Wege finden mit schematisierten Karten, 49. Tagung Experimentell Arbeitender Psychologen (TeaP 2007), Trier, Germany 234.
CiteID: 4438
67. Mohler BJ, Thompson WB, Creem-Regehr SH, Willemsen P, Pick HL und Rieser JJ (Januar-2007) Calibration of locomotion resulting from visual motion in a treadmill-based virtual environment ACM Transactions on Applied Perception 4(1) 20-32.
CiteID: 4546
66. Mohler B: The effect of feedback within a virtual environment on human distance perception and adaptation, University of Utah, Salt Lake City, UT, USA, (Januar-2007). PhD thesis
CiteID: 4693
65. Hölscher C, Meilinger T, Vrachliotis G, Brösamle M und Knauff M (Dezember-2006) Up the down staircase: next term Wayfinding strategies in multi-level buildings Journal of Environmental Psychology 26(4) 284-299.
CiteID: 3858
64. Blouin J, Guillaud E, Bresciani J, Guerraz M, Gauthier G und Simoneau M (Oktober-2006): Hand stabilization during body motion shares similar control processes with known vestibular-driven motor responses, 36th Annual Meeting of the Society for Neuroscience (Neuroscience 2006), Atlanta, GA, USA.
CiteID: BlouinGBGGS2006
63. Meilinger T (September-7-2006) Invited Lecture: Orientierung im Raum mit Karten und wie Menschen ihren Weg von A nach B finden, Universität Braunschweig: DLR Institut für Verkehrssystemtechnik, Braunschweig, Germany.
pdfCiteID: Meilinger2006
62. Bresciani J-P, Dammeier F und Ernst MO (August-2006): Automatic integration of visual, tactile and auditory signals for the perception of sequences of events, 29th European Conference on Visual Perception, St. Petersburg, Russia, Perception, 35(ECVP Abstract Supplement) 102.
CiteID: 4180
61. Bresciani J-P, Guillaud E, Guerraz M, Simoneau M, Gauthier GM, Bülthoff HH und Blouin J (August-2006): Vestibular-evoked hand stabilisation during body motion, 29th European Conference on Visual Perception, St. Petersburg, Russia, Perception, 35(ECVP Abstract Supplement) 179.
CiteID: 4181
60. Mohler BJ, Creem-Regehr SH und Thompson WB (Juli-2006) The influence of feedback on egocentric distance judgments in real and virtual environments, 3rd Symposium on Applied Perception in Graphics and Visualization (APGV 2006), ACM Press, New York, NY, USA, 9-14.
CiteID: MohlerCT2006
59. Meilinger T, Knauff M und Bülthoff HH (Juli-2006) Working memory in wayfinding: a dual task experiment in a virtual city, 28th Annual Conference of the Cognitive Science Society (CogSci 2006), 5th International Conference of the Cognitive Science Society (ICCS 2006), Curran, Red Hook, NY, USA, 585-590.
pdfCiteID: 3855
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Last updated: Montag, 01.09.2014