The Contribution of Different Body Channels to the Expression of Emotion in Animated Pedagogical Agents

The Contribution of Different Body Channels to the Expression of Emotion in Animated Pedagogical Agents

Saikiran Anasingaraju, Nicoletta Adamo-Villani, Hazar Nicholas Dib
Copyright: © 2020 |Pages: 19
DOI: 10.4018/IJTHI.2020100105
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Abstract

Pedagogical agents are animated characters embedded within an e-learning environment to facilitate learning. With the growing understanding of the complex interplay between emotions and cognition, there is a need to design agents that can provide believable simulated emotional interactions with the learner. Best practices from the animation industry could be used to improve the believability of the agents. A well-known best practice is that the movements of limbs/torso/head play the most important role in conveying the character's emotion, followed by eyes/face and lip sync, respectively, in a long/medium shot. The researchers' study tested the validity of this best practice using statistical methods. It investigated the contribution of 3 body channels (torso/limbs/head, face, speech) to the expression of 5 emotions (happiness, sadness, anger, fear, surprise) in a stylized agent in a full body shot. Findings confirm the biggest contributor to the perceived believability of the animated emotion is the character's body, followed by face and speech respectively, across 4 out of 5 emotions.
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2. Literature Support

This section summarizes prior research on Animated Pedagogical Agents. In particular, a discussion of animated pedagogical agents and a review of existing examples are presented in subsection 2.1. Existing affective agents systems and studies on the effect of the agent’s emotion on students’ learning are described in sub-section 2.1.1. Expression of emotion in character animation and acting is discussed in sub-section 2.2.

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