Using muscular avatars in VR to reduce pain perception

Tsukuba, Japan—The phenomenon known as the Proteus Effect, wherein the appearance of an avatar influences a person's behavior and perception in a virtual reality (VR) environment, is well-known. Previous studies have reported that user behavior toward the opposite sex and weight perceptions can be altered. A study undertaken by researchers at the University of Tsukuba aimed to determine how the Proteus Effect influences pain perception.

For the experiments, the researchers developed avatars with muscular and average-body types for each sex, resulting in four distinct avatars. A total of 44 undergraduate and graduate students participated in this study. They wore head-mounted displays and engaged in a specific task within a VR setting, using one of the assigned avatars. To simulate pain, thermal stimuli were applied to the participants' arms in the real world and their pain perception was assessed.

The findings revealed that the participants reported ~16% lower pain scores on the Pain Assessment Scale when using the muscular avatar than when using the average-body avatar. Furthermore, when the participants' and avatars' genders were matched, the reported pain scores were considerably lower than when they did not match. This indicates that gender differences play a role in the Proteus Effect. This research provides valuable insights into how VR technology can be employed to manage pain without the need for anesthesia or pharmaceuticals.

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This work was supported by JSPS KAKENHI Grant Number 20K21800 and 22K19784, and JST SPRING Grant Number JPMJSP2124.

_{Original Paper}

Title of original paper:
The proteus effect on human pain perception through avatar muscularity and gender factors

Journal:
Scientific Reports

DOI:
10.1038/s41598-024-61409-4

_{Correspondence}

Professor TANAKA, Fumihide
Institute of Systems and Information Engineering, University of Tsukuba

_{Related Link}

Institute of Systems and Information Engineering