User experience evaluation of human representation in collaborative virtual environments

Human embodiment/representation in virtual environments (VEs) similarly to the human body in real life is endowed with multimodal input/output capabilities that convey multiform messages enabling communication, interaction and collaboration in VEs. This paper assesses how effectively different types of virtual human (VH) artefacts enable smooth communication and interaction in VEs. With special focus on the REal and Virtual Engagement In Realistic Immersive Environments (REVERIE) multi-modal immersive system prototype, a research project funded by the European Commission Seventh Framework Programme (FP7/2007-2013), the paper evaluates the effectiveness of REVERIE VH representation on the foregoing issues based on two specifically designed use cases and through the lens of a set of design guidelines generated by previous extensive empirical user-centred research. The impact of REVERIE VH representations on the quality of user experience (UX) is evaluated through field trials. The output of the current study proposes directions for improving human representation in collaborative virtual environments (CVEs) as an extrapolation of lessons learned by the evaluation of REVERIE VH representation.

[1]  Mel Slater,et al.  Presence in immersive virtual environments , 1993, Proceedings of IEEE Virtual Reality Annual International Symposium.

[2]  C. Goodwin.  Gestures as a resource for the organization of mutual orientation , 1986 .

[3]  Daphne Economou.  The role of virtual actors in collaborative virtual environments for learning , 2001 .

[4]  Noel E. O'Connor,et al.  REVERIE: Natural human interaction in virtual immersive environments , 2014, 2014 IEEE International Conference on Image Processing (ICIP).

[5]  Steve Pettifer,et al.  Problem driven CVE technology development , 2002, J. Netw. Comput. Appl..

[6]  Petros Daras,et al.  Natural User Interfaces for Virtual Character Full Body and Facial Animation in Immersive Virtual Worlds , 2015, AVR.

[7]  M. Argyle.  Bodily communication, 2nd ed. , 1988 .

[8]  Tom Boyle,et al.  Requirements elicitation for virtual actors in collaborative learning environments , 2000, Comput. Educ..

[9]  Daphne Economou,et al.  Towards a user-centred method for studying CVEs for learning , 2005 .

[10]  Petros Daras,et al.  RAAT - The reverie avatar authoring tool , 2013, 2013 18th International Conference on Digital Signal Processing (DSP).

[11]  Fred D. Davis,et al.  Toward preprototype user acceptance testing of new information systems: implications for software project management , 2004, IEEE Transactions on Engineering Management.

[12]  Subramanian Ramamoorthy,et al.  Using wearable inertial sensors for posture and position tracking in unconstrained environments through learned translation manifolds , 2013, 2013 ACM/IEEE International Conference on Information Processing in Sensor Networks (IPSN).

[13]  Philipp Fechteler,et al.  A framework for realistic 3D tele-immersion , 2013, MIRAGE '13.

[14]  P. Ekman,et al.  Facial action coding system , 2019 .

[15]  Fons Kuijk,et al.  Autonomous agents and avatars in REVERIE's virtual environment , 2015, Web3D.

[16]  Petros Daras,et al.  Real-Time, Full 3-D Reconstruction of Moving Foreground Objects From Multiple Consumer Depth Cameras , 2013, IEEE Transactions on Multimedia.

[17]  Gloria Mark,et al.  Social Conventions in Collaborative Virtual Environments , 1998 .

[18]  D. Silverman.  Interpreting Qualitative Data: Methods for Analysing Talk, Text and Interaction , 1994 .

[19]  Steve Pettifer,et al.  DEVA 3 : Architecture for a Large-Scale Distributed Virtual ReaJRy System , 2001 .

[20]  Steve Benford,et al.  User embodiment in collaborative virtual environments , 1995, CHI '95.

[21]  Mel Slater,et al.  The Sense of Embodiment in Virtual Reality , 2012, PRESENCE: Teleoperators and Virtual Environments.

[22]  David Thue,et al.  Become your Avatar: Fast Skeletal Reconstruction from Sparse Data for Fully-tracked VR , 2016, ICAT-EGVE.

[23]  Steve Pettifer,et al.  DEVA3: architecture for a large-scale distributed virtual reality system , 2000, VRST '00.

[24]  Helen M. Smith,et al.  Interpreting Qualitative Data: Methods for Analyzing Talk, Text and Interaction 3rd Edition , 2006 .

[25]  Harvey Sacks,et al.  Lectures on Conversation , 1995 .

[26]  D. Kahneman,et al.  Attention and Effort , 1973 .