TactorBots: A Haptic Design Toolkit for Out-of-lab Exploration of Emotional Robotic Touch

Title of the Paper

TactorBots: A Haptic Design Toolkit for Out-of-lab Exploration of Emotional Robotic Touch

Paper Information

• Field: Human-Computer Interaction (HCI) and Emotional Haptic Design
• Keywords:
  • Haptic Design Toolkit
  • Wearable
  • Emotional Robotic Touch
  • Design Research
  • Creativity Support
  • Outside of Lab Study

Research Background and Problem

• Problems and Challenges:
  1. The meaning of human touch is ambiguous across different contexts and subjective interpretations, making it difficult to establish a universal haptic language.
  2. Replicating realistic human touch may lead to the "uncanny valley effect."
  3. Traditional research methods limit the natural expression and exploration of haptic design in real-world environments.
• Why It Matters:
  • Interdisciplinary collaboration enriches the social significance of touch, expanding it into an artistic and emotional form of interaction.
  • Personalization and ambiguity may foster deeper interaction and sustained design engagement.
• Research Motivation:
  • To explore the "heterogeneity" in robotic touch and leverage its ambiguity as an opportunity for design and prolonged use.
  • To understand the mechanisms that trigger different design interpretations through a design toolkit and contextual experiments.

Solution

• Methods or Solutions:
  • Introduced TactorBots, an open-source wearable hardware module and web-based software tool for customizable robotic haptic design.
  • Utilized 8 plug-and-play mechanical haptic modules to provide 9 types of haptic gestures, such as "push," "knead," "pat," etc.
  • Encouraged designers to freely explore and experiment to discover new meanings of touch.
• Innovations:
  • TactorBots is the first wearable haptic platform specifically designed for "out-of-lab exploration."
  • Its modularity and customizability make it an easy-to-use, flexible, and expressive tool.
  • Emphasized "heterogeneity" and "ambiguity" to stimulate participants' creativity and reflection.
• Implementation Steps:
  1. Designed hardware modules in a simple form, highlighting their functionality and mechanical essence.
  2. Provided a web-based GUI software tool for quick control and saving haptic patterns.
  3. Conducted long-term experiments allowing designers and researchers to independently explore haptic design in real-world scenarios.

Research Outcomes

• Specific Findings:
  1. Identified how participants used ambiguous robotic touch to inspire novel creative and design methods.
  2. Offered recommendations for improving emotional haptic design and toolkit user experience.
• Comparison with Existing Solutions:
  • Compared to existing haptic platforms, TactorBots supports a greater variety of haptic types (N=9), enhancing design flexibility across different body parts.
  • Validated as more suitable for "out-of-lab" usage.
• Experimental or Evaluation Results:
  1. The tool's usability and functionality received positive feedback from 13 designers and researchers.
  2. Experiments revealed diverse metaphors (e.g., animal behaviors, cartoon characters), which were not necessarily direct imitations of human gestures.
  3. Long-term field experiments uncovered how contextual environments (e.g., home or studio) influenced design inspiration.
• Limitations and Future Directions:
  • Limitations:
    1. The module connection method is somewhat cumbersome, and noise issues may affect experiments in certain cases.
    2. While long-term experiments offer flexibility, they may pose time management challenges for some participants.
  • Future Directions:
    1. Explore more diverse haptic forms (e.g., temperature, softness, adherence).
    2. Further investigate how ambiguity influences the depth of individual haptic interpretations.
    3. Study how to incorporate user consent mechanisms into haptic interactions to enhance trust.

Conclusion

TactorBots is an innovative toolkit for designing robotic haptic systems, introducing ambiguity and heterogeneity into the design space. Through long-term cross-context experiments, it opens new possibilities for future haptic technologies and artistic expression. Additionally, the study highlights the importance of context and individuality in haptic design, calling for future research to explore more potential dimensions and social significance of touch.