The research method used a line-of-sight measurement device (Tobii TX9 * 1) that measures the line of sight when viewing images for 24 babies aged 300 months to 1 and a half years.Only one of the two who appeared on the screen looked at the target baby, and the other showed the baby "unaware".It turns out that babies aged one and a half tend to quickly look at people who are "unaware."

　In this study, we conducted a comparison with other conditions and statistical analysis, such as no such line-of-sight pattern being seen in "a scene where two people appearing on the screen share attention in advance".On top of that, it shows that you are recognizing and acting not only the "difference in knowledge and attention state between yourself and the other person" that has already been clarified so far, but also the "difference in knowledge between others". I concluded.

　This research result gives a new perspective in understanding the developmental origin of ability in humans, and is considered to be of great significance in the field of child-rearing and education.In the future, we will identify the developmental factors that cause the above tendency to appear at the age of one and a half, and set up various situations in face-to-face situations, and how the baby will (or will not) communicate according to the situation. Will be examined empirically.

　A group of researchers said, "Daily communication, which is very common for adults, is actually based on various abilities and cognitive biases. Babies make such assumptions. We will acquire it through daily communication (similar to words). We will continue to unravel what the baby is doing "unexpectedly" and not "unexpectedly", and from the perspective of development, of society and culture. I want to clarify the basics. "

* 1 A device that measures the line of sight in a non-contact manner using infrared rays and image analysis technology.