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| Eye movement study on face fixation preference of children aged from 10 months to 6 years |
| ZHOU Shuqing1,2, LIU Fulin3, HOU Li2, ZHANG Xin2, WEI Ning2, HONG Qin2, CHI Xia1,2, YU Dongchuan3, TONG Meiling1,2 |
1. Nanjing Medical University, Nanjing 211166, Jiangsu Province, China; 2. Women’s Hospital of Nanjing Medical University, Nanjing 210004, Jiangsu Province, China; 3. School of Biological Sciences and Medical Engineering, Southeast University, Nanjing 210096, Jiangsu Province, China |
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Abstract Objective To explore the eye movement characteristics and rules of typically developing children’s face fixation preference, so as to provide effective reference for early clinical identification of children with neurodevelopmental disorders. Methods A total of 540 normal children aged from 10 months to 6 years were collected by convenient sampling and stratified random sampling, who were divided into 9 groups according to their age. The eye movement paradigm of face fixation preference was established. The eye movement data of children were captured by Tobii Eye Tracking. The target area fixation rate and the first fixation area were analyzed. Results In the multiple face fixation paradigm, the fixation rate of female face in children under 2.5 years old was significantly higher than that in child and male faces. The fixation rate of child face in children over 4 years old was significantly higher than that in female and male faces. From the age fixation trajectory of female, child, and male faces, the intersection of female and child face fixation rate appeared between 2.5 and 3 years old, while the male face fixation rate was always lower than that of female and child faces. In the single face fixation paradigm, when looking at female and child faces in all age groups, the first fixation area was the eye area, while the first fixation area of male faces was the mouth area. The eye area fixation rate of female, child, and male faces in all age groups was significantly higher than that in other regions, and there were significant differences. The first fixation of female, child, and male faces in different age groups showed a stable trend, with eye area>mouth area>frontal region>nasal region in female and child faces, while mouth area>eye area>frontal region>nasal region in male face. Conclusion Children of different ages show fixation preferences for different faces and target regions, and show some characteristics and rules of age, which can provide a reference basis for early identification of children with neurodevelopmental disorders.
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