A research group led by Misa Kobayashi, a third-year doctoral student at the Graduate School of Integrated Science and Engineering, Chiba University, and Professor Makoto Ichikawa, a graduate student at the Graduate School of Humanities, investigated the effects of emotional reactions on visual perception when observing images. It was confirmed again that it looks like slow motion.
In a 2016 study, the research team used a database of photographs that evoke emotional reactions and impressions of varying intensity, and obtained the world's first result of an increase in visual temporal accuracy when sensing danger.This supported reports that "things appeared to be in slow motion" when suddenly in dangerous situations, but the color characteristics of the images in the database used in the experiment were not consistent. Therefore, it was required to confirm the research results using images whose characteristics did not change significantly.
Therefore, this time, the research group showed experimental participants angry, fear, joy, and expressionless facial images of two men and women for 2 second, and reduced the saturation of the image by 1% in the range of 10 to 50 milliseconds. The time required to see a change was measured.
As a result, it was found that anger, fear, and joyful facial images were perceived to lose saturation in a shorter time than expressionless facial images.When the images were shown upside down to make it difficult to read facial expressions, these facial expressions did not make a difference in perception of desaturation.
Furthermore, when we investigated the time during which a low-saturation image was displayed, showing an angry expression with a large emotional reaction to the point of feeling startled, a moderately sad expression, and a small expressionless expression, the time was shorter in the order of anger, sadness, and expressionlessness. rice field.The research group believes that the stronger the feeling of excitement, the easier it is to recognize the event in a short time.
It is said that slow motion can be seen in dangerous situations such as traffic accidents and sports games where the tension is high.The research group believes that the results of this study will be the first step toward clarifying such a phenomenon.
Paper information:[i-Perception] Emotional response evoked by viewing facial expression pictures leads to higher temporal resolution
