Measuring the ‘reality’ in virtual reality

Experimental setup to evaluate the accuracy and accuracy of the VRHMD.Credit: Ryo Tachibana

If the audio suddenly lags behind the video, you are on a zoom call. My colleague’s lips move, but they look like a dubbed movie. It’s a little inconvenient. However, this small problem is very detrimental to scientific experiments using virtual reality (VR).

For example, for researchers using VR to recreate the cognitive benefits of bed-bound patients’ movements, delays in visual and auditory stimuli can interfere with data and results.

Therefore, as the use of VR in human behavior research increases, so does the need for vision and vision. Auditory stimulation It is displayed with millisecond accuracy, improving accuracy.

A research team at Tohoku University measured the accuracy and accuracy of visual and auditory stimuli with the latest VR head-mounted display (HMD) using the programming language Python.

Details of their study were published in the journal Behavior research method August 3, 2021.

“The most standard way Laboratory research “It’s not optimized for VR environments,” said Ryo Tachibana, co-author of the paper. “It’s not dedicated software that allows for better experimental control, but in most VR research with 3D game engines. We have a Unity or Unreal Engine. “

Establishing a better VR environment with the flexibility of researchers to control and adjust them according to the experiment leads to more reliable results.

Tachibana and Kazumi Matsumiya used the latest Python tools for VR experiments and a special measurement device for stimulation timing called the Black Box Toolkit.

They recorded a time lag of 18 milliseconds (ms) Visual stimulus With modern VRHMD. For auditory stimulation, there was a time lag of 40-60 ms, depending on the HMD. The standard time lag deviation, jitter, was recorded in 1 ms for visual stimuli and 4 ms for auditory stimuli. All results were consistent in both Python 2 and 3 environments.

Tachibana points out that despite the surge in adoption in action research, there has been little empirical data to evaluate the accuracy and accuracy of VR environments.

“We believe our research will be useful not only for researchers and developers applying VR technology, but also for rehabilitation tools that require high timing accuracy to record biological data.” Mr. Tachibana added.

Studies show how our brain synchronizes hearing and vision

For more information:
Ryo Tachibana et al., Accuracy and accuracy of presentation of visual and auditory stimuli in virtual reality in Python 2 and 3 environments for human behavior research, Behavior research method (2021). DOI: 10.3758 / s13428-021-01663-w

Provided by
Tohoku University

Quote: Https: // Obtained from September 6, 2021 Virtual Reality (September 6, 2021) “Reality” Measurement

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