Three Different Modes of Avatars as Virtual Lecturers in E-learning Interfaces: A Comparative Usability Study~!2010-04-10~!2010-05-24~!2010-09-02~!

Abstract

Most of recent e-learning applications are predominantly based on textual and graphical metaphors to communicate the learning material in its user interfaces. Previous research demonstrated that incorporating both visual and auditory sensory channels in the interaction with e-learning interfaces could enhance the usability and users' learning performance. Also, the presence of humanoid virtual lecturers in e-learning interfaces was found to be attractive for e-learners. This paper describes an empirical evaluation of three different modes for the employment of speaking avatars as virtual pedagogical agents in a multimodal-based e-learning. This study aimed at comparing the usability aspects (efficiency, effectiveness and user satisfaction) as well as learning performance of three different e-learning platforms recruited to present three common lessons about class diagram notation. The first platform involved talking head of facially expressive avatar while the second platform used a full-body animated one. However, the third tested e-learning platform was based on talking heads of tow facially expressive virtual lectures; male and female who shared the presentation of the learning material. In total, 48 users participated in the experiment to test the three platforms in a within-subject design. Results of the experiment showed that the inclusion of speaking virtual lecturer with full body gestures was the most efficient in terms of question answering time, most effective in terms of correctly answered questions, and the most satisfactory as opposed to the other tow investigated e-learning platforms. Experimental results also revealed that using facially expressive avatars either singularly or coupled with female one scored similar levels of usability and learning performance.

A Study of the Effects of Teaching Avatars on Students' Learning of Surveying Mathematics

“…Adding redundant gesture was found to increase verbal recall of the material, as well as to increase the social qualities attributed to the agent (Buisine & Martin, 2007). A comparative study of three e-learning interfaces, one incorporating a talking head, one incorporating a full-body avatar, and one with two talking heads interacting with each other, suggests that e-learning materials incorporating full-body teaching agents that speak and gesticulate are the most efficient, effective and engaging (Alseid & Rigas, 2010).…”

Immersive virtual environments and embodied agents for e-learning applications

“…Embodied Agent tutors impact learner satisfaction and engagement within IVEs by simulating the relationship between student and tutor (Alseid & Rigas, 2010). A learner's social judgement of interactions with an EA impacts perceived co-presence and satisfaction, with human-like representations regarded as more social than non-human avatars (Nowak, 2004).…”

Peer Review #3 of "Immersive virtual environments and embodied agents for e-learning applications (v0.1)"

“…EA tutors impact learner satisfaction and engagement within IVEs by simulating the relationship between student and tutor (Alseid and Rigas, 2010). A learner's social judgement of interactions with an EA impact perceived co-presence and satisfaction, with human-like representations regarded as more social than non-human avatars (Nowak, 2004).…”