Ivan Gris

Ivan Gris
University of Texas at El Paso | UTEP · Department of Computer Sciences

Ph.D. Computer Science

About

13
Publications
1,581
Reads
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60
Citations
Introduction
I research human-agent interaction through virtual environments and embodied conversational agents. My main research goal is to enhance the feeling of rapport between humans and agents through non-verbal and paralinguistic behaviors.
Additional affiliations
January 2012 - July 2015
University of Texas at El Paso
Position
  • Research Assistant
Description
  • I research human-agent interaction through virtual environments and embodied conversational agents. My main research goal is to enhance the feeling of rapport between humans and agents through non-verbal and paralinguistic behaviors.

Publications

Publications (13)
Conference Paper
Full-text available
The Boston Massacre History Experience is a multimodal interactive virtual-reality application aimed at eighth-grade students. In the application, students students have conversations with seven embodied conversational agents, representing characters such as John Adams, a tea-shop owner, and a redcoat. The experience ends with a conversation with A...
Conference Paper
Full-text available
The literature suggests that familiarity and rapport are enhanced by larger, more extraverted gestures. However, the sizes of the increases in amplitude have not been reported. We sought to determine whether this relationship holds true for interaction between humans and embodied conversational agents. To this end, we conducted an experiment in whi...
Conference Paper
Full-text available
This paper describes a system for embodied conversational agents developed by Inmerssion and one of the applications—Young Merlin: Trial by Fire —built with this system. In the Merlin application, the ECA and a human interact with speech in virtual reality. The goal of this application is to provide engaging VR experiences that build rapport throug...
Conference Paper
This paper describes a system for embodied conversational agents (ECAs) developed at the University of Texas at El Paso by the Advanced aGent ENgagement Team (AGENT) and one of the applications -- Survival on Jungle Island -- built with this system. In the Jungle application, the ECA and a human interact with speech and gesture for approximately 40...
Conference Paper
Our research seeks to provide embodied conversational agents (ECAs) with behaviors that enable them to build and maintain rapport with human users. To conduct this research, we need to build agents and systems that can maintain high levels of engagement with humans over multiple interaction sessions. These sessions can potentially extend to longer...
Conference Paper
In animating embodied conversational agents (ECAs), run-time blending of animations can provide a large library of movements that increases the appearance of naturalness while decreasing the number of animations to be developed. This approach avoids the need to develop a costly full library of possible animations in advance of use. Our principal sc...
Conference Paper
To help guide design and development of embodied conversational agents, this study reviews the evolving qualities of naturalistic agents by identifying and tracking their most relevant features. The study extends prior taxonomies of characteristics of ECAs, developing a rubric that distinguishes agents’ visual and functional characteristics. The st...
Conference Paper
Full-text available
Development of embodied conversational agents (ECAs) has tended to focus on the character's dialog capabilities, with less research on the design and effect of the agent's voice and of the virtual environments in which the agent exists. For a study of human-ECA rapport, we iteratively developed three versions of a game featuring an ECA, where each...
Conference Paper
Full-text available
This study is part of a longer-term project to provide embodied con-versational agents (ECAs) with behaviors that enable them to build and main-tain rapport with their human partners. We focus on paralinguistic behaviors, and especially nonverbal behaviors, and their role in communicating rapport. Using an ECA that guides its players through a spee...
Conference Paper
Full-text available
This paper reports our experience in applying an empirical user-experience testing method to improve a computer game. We sought to understand the differences in practice between usability and playability, and correspondingly to assess the usefulness of different approaches to taxonomies for playability. Our experience suggests that the evaluation t...
Conference Paper
Full-text available
In this paper I describe my research goals and hypotheses regarding human-computer relationships with embodied conversational agents (ECAs). I include important studies of related research that inform and direct my own efforts. I explain the current state and some technical aspects of the ECAs I have contributed to create, and past experiments rega...
Conference Paper
Full-text available
This study explores the empirical basis for multimodal conversation control acts. Applying conversation analysis as an exploratory approach, we attempt to illuminate the control functions of paralinguistic behaviors in managing multiparty conversation. We contrast our multiparty analysis with an earlier dyadic analysis and, to the extent permitted...
Conference Paper
Full-text available
We describe an exploratory study of what happens when a person en- ters a room where people are conversing, based on an analysis of 61 episodes drawn from the UTEP-ICT cross-cultural multiparty multimodal dialog corpus. We examine the reliability of coding of gaze and stance, and we develop a model for room-entry that accounts for observed differen...

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Projects

Project (1)
Project
This project aims to advance interaction with embodied conversation agents in virtual reality. The project's main focus is extending models of mixed-initiative interaction--verbal and physical--to scenes where the user interacts with multiple agents.