Previous studies have determined that astronauts can judge reverse motion better than humans on Earth due to astronauts’ unique visual-motor experience with reverse motions in space .
Now, a new study, in which University of Wyoming researchers played a key role, shows that people on Earth have an expanded visual experience with inverted movements — such as straight dancers. standing — can overcome the reverse effect in biological motion perception.
Qin Zhu, professor of kinematics and health at UW, is the team leader and the lead author of a paper titled “Extended visual experience with reverse motions can overcome the inverse of the effect.” in biological motion perception” was published on October 20, Scientific reports.
“As pointed out in the title of the paper, we have demonstrated that the reverse effect in biological motion perception (BMP) can be overcome,” says Zhu. “BMP is fascinating because it’s a survival skill that both humans and animals share. We can read movements made by other people of the same or different species and figure out who the actors are and what they’re doing. what the actor intends. So we can better prepare our reaction, to escape or join. However, if the movement is done upside down or reversed, that possibility will greatly reduced.”
Margaret Wilson, professor and head of the UW Department of Theater and Dance, is the second author of the paper. For the research, Wilson provided a list of verticals leap movement; facilitate motion recording of movements; recruiting vertical dancers for the test; and edit the article.
Xiaoye Wang, a postdoctoral fellow in the Department of Kinesiology and Physical Education at the University of Toronto, is another lead author of the paper. Zhu worked with Wang to conceptualize and conduct the research; analysis of results; and drafting and revising articles.
Other contributors are from Shanghai Sports University and Shanghai University of Finance and Economics, who helped recruit participants in China to help increase the sample size diversity of the study. .
The study included 52 adult volunteers – 15 participants did not have any dance experience; 21 participants with an average of 7.71 years of typical dance experience; and 16 participants with 4.75 years of vertical jumping experience. Vertical dancers are from UW and Europe.
Subjects were presented with 40 dance moves in the form of a point-light display on a computer. There are 10 pairs of dance moves, each pair includes a dance move performed on the ground and another in the air. In half of the test tests, the display was artificially inverted. Standing dancers, traditional dancers and non-dancers were asked if the screen was artificially inverted or as it was.
Only vertical dancers can identify reverse movements performed in the air. Vertical dancers are all capable of determining an artificial inversion regardless of whether the dance movement is performed on the ground or in the air.
Traditional and non-dancer dancers – who have no experience performing inversions – are unable to distinguish inversions on a point light display from inversions performed in the air. , according to the article. The paper’s findings suggest that visual experience with reversed motions plays a more important role in allowing the observer to identify inverted biological motion.
Zhu said those who have experience viewing and/or performing reverse motions while suspended in the air can use that experience to perceive and understand inversion movements.
“So spectators who have seen vertical dance performances will have a better understanding of the reverse movements than those who have never seen such a performance,” says Zhu. “And, for those who want to learn and perform vertical dance in the future, both visual and motor training – involving inversion movements – is required to improve awareness and perception of movements. own movements in relation to a partner or audience during a dance vertical performance.”
Zhu adds that those without any dance experience can rate vertical dance moves “fairly well” compared to trained dancers, suggesting there are similarities between the two. vertical dance movements and movements in daily life.
“Related to Science Fiction“Spider-man must be able to outperform others in reading any reverse motion,” Zhu said.
A follow-up study, using an eye-tracking device, was performed to examine the image-seeking patterns of standing dancers compared with traditional dancers while each group observed a point-light display. to evaluate actions.
“Based on the research findings, a visual training program will be designed to train students enrolled in UW vertical dance classes,” said Zhu.
Xiaoye Michael Wang et al., Extended visual experience with inversion movements can overcome the inversion effect in biological motion perception, Scientific reports (In 2022). DOI: 10.1038 / s41598-022-21000-1
University of Wyoming
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