LIVE-streaming 3D images: A neuroscience approach to full-body illusions

Behavior Research Methods, 2022 · DOI: 10.3758/s13428-021-01659-6 · Published: September 28, 2021

Simple Explanation

The study introduces a novel technique using 3D LIVE-streaming to create real-life stereoscopic 3D full-body illusions, enabling unobstructed investigation with neuroscience methods. Unlike previous methods relying on head-mounted displays, this approach allows the use of transcranial direct current stimulation, transcranial magnetic stimulation, electroencephalography, and near-infrared spectroscopy to study the neural basis of these illusions. The 3D LIVE-streaming method is not GPU-intensive, making it easily applicable to various devices, with potential clinical and commercial benefits, such as enhancing clinical observations, educational tools, rehabilitation programs, and immersive online gaming experiences.

Study Duration

Not specified

Participants

36 healthy volunteers (24 females, 12 males; mean age = 24.7; SD = 6.1)

Evidence Level

Not specified

Key Findings

1
The average reported displacement towards the projected image was 69.1 cm in Session 1 and 72.4 cm in Session 2, confirming the effectiveness of the novel FBI-paradigm.
2
A significant main effect for displacement in pre- and post-test scores over sessions was found, indicating a behavioral impact of the illusion.
3
A strong positive correlation between the amount of displacement and reported experiences was shown, supporting the link between behavioral and psychometric measures.

Research Summary

The study introduces a 3D LIVE-streaming technique to create full-body illusions, addressing limitations of head-mounted displays in neuroscience research. The method involves capturing and streaming high-quality 3D images, allowing unobstructed access to the head for neuroscience methods like brain stimulation. The results demonstrate the effectiveness of the new paradigm, showing significant illusory displacement and correlation with subjective experiences, suggesting potential clinical and commercial applications.

Practical Implications

Clinical Observations and Education

3D LIVE-streaming can enhance clinical observations and educational tools by providing real-time, high-quality 3D images.

Rehabilitation Programs

The method can be used in rehabilitation programs to aid recovery from nervous system injuries or alleviate psychosis symptoms.

Immersive Online Experiences

3D LIVE-streaming can set a new standard for immersive online gaming and augment online and mobile experiences, such as video chat and social events.

Study Limitations

1
The setup is not suitable to combine with MEG or fMRI/PET, because participants are videotaped from behind.
2
Participants with high susceptibility traits were screened out in our study
3
The novel FBI paradigm requires 4×2 meters space

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