Reading in VR: The Effect of Text Presentation Type and Location

Title of the Paper

Reading in VR: The Effect of Text Presentation Type and Location

Paper Information

• Subject Area: Virtual Reality (VR) text reading experience
• Keywords: Virtual Reality, RSVP, Text Display in VR, Reading in VR, Text Presentation Type, Text Display Location

Research Background and Issues

• Identified Challenges:
  • Optimal practices for text display and reading in virtual reality (VR) environments remain unclear.
  • Two-dimensional static display formats are widely used on digital devices, but how to optimize text display in 3D VR environments requires further research.
  • Dynamic VR activities may impact the user experience of text reading environments.
• Significance:
  • Text is widely used in VR, such as game instructions, environmental information, or real-world data notifications.
  • Efficient text display and reading can enhance the accuracy of information acquisition and improve user experience in VR.
• Research Motivation:
  • Investigate the impact of different text presentation methods and locations on reading efficiency and user experience in VR.
  • Provide practical design recommendations for text display in VR environments.
• Related Work:
  • Studies have explored the effects of visual attributes, location, and text volume on readability.
  • Research has examined the application of Rapid Serial Visual Presentation (RSVP) methods on screen-limited devices and their reading efficiency.
  • Issue: How combinations of RSVP methods and different locations affect text reading experiences in virtual environments remains unclear.

Solution

• Research Methods:
  • Compare two text presentation methods: Paragraph and Rapid Serial Visual Presentation (RSVP).
  • Investigate three types of text locations: world-fixed, edge-fixed, and head-fixed.
• Innovations:
  • Systematic experiments combining text presentation methods (Paragraph/RSVP) and location layouts to analyze their effects on task completion time, error rate, task load, usability, and preference.
  • Integrate quantitative results with subjective user feedback to propose practical design recommendations.
• Implementation Steps:
  1. Experiment Design:
     • Six conditions: 2 text presentation methods × 3 location types.
     • Participants experienced all conditions using a within-subjects design, with randomized condition order.
  2. Experimental Task: Match the correct text labels to paintings in a virtual museum, recording task time, error rate, and user experience.
  3. Data Measurement:
     • Quantitative metrics: Task Completion Time (TCT), Error Rate, Task Load (RTLX), Usability (SUS), and Immersion (IPQ).
     • Subjective feedback: User preferences and feedback for each text display condition.
  4. Data Analysis: Quantitative descriptive statistics and participant feedback to evaluate the advantages and disadvantages of the two text presentation methods.

Research Findings

• Key Findings:
  • RSVP method resulted in lower error rates and shorter task completion times compared to the Paragraph method.
  • World-fixed location increased task load under RSVP conditions but had no significant impact on the Paragraph method.
  • Paragraph display in head-fixed locations reduced usability and increased task load, leading to higher error rates.
• Advantages:
  • RSVP method occupies less display space, facilitating user movement and reading tasks.
  • Paragraph display is suitable for static environments and important long-text reading, as it allows rereading.
  • Edge-fixed location provides optimal text visibility, regardless of positional angles.
• Experimental Results:
  • User efficiency under the two presentation types: Average error rate for Paragraph condition was 1.78, while RSVP was 1.46.
  • User preference: RSVP method was preferred over the Paragraph method, and edge-fixed location was preferred over world-fixed and head-fixed locations.
• Limitations and Future Directions:
  • Limitations:
    • The current experiment was conducted only in a static, small-scale virtual environment, without testing dynamic or large-scale environments.
    • Did not test other movement methods (e.g., teleportation) in multitasking scenarios.
    • Head-fixed display obstructs the user’s field of view; future studies could explore methods for freely dragging text across the screen.
  • Future Directions:
    • Continue investigating the impact of text importance and length on different presentation methods.
    • Explore real-time interactive features, such as RSVP’s ability to rewind and adjust reading speed.
    • Test the usability of dynamically fixed text at horizontal angles.

Design Recommendations

1. For short text: Use the RSVP method combined with edge-fixed or head-fixed locations to support effective reading while users move within the virtual environment.
2. For long text: Combine the Paragraph method with world-fixed or edge-fixed locations, suitable for more focused reading tasks.
3. Edge-fixed location is recommended for dynamic scenarios requiring tasks from multiple angles.
4. Head-fixed location is suitable for reading distant text or emphasized content but should be avoided for long text.

Conclusion

This paper provides practical design recommendations for text presentation and location in VR environments based on experimental research. It also identifies future research directions, such as optimizing interactive features and dynamic positioning techniques.