Cross Sectional Study Essay

This cross-sectional study explored the changing field of vision of infants as they gain developmental postures—specifically crawling and walking. The purpose of this study was to define the difference in an infant’s visual field through use of head-mounted cameras in various postures to determine their visual field in order to associate field of visual with posture and to relate with visual experiences. This study incorporated two experiments in order to fully analyze the use of an infant’s vision field. The first part explored what spatial range infants see in each posture. The participants included 30 infants aged 13 months. Fifteen infants were crawlers (8 boys and 7 girls) and fifteen were walkers (7 boys and 8 girls). Each infant wore a head-mounted eye tracker and they traveled on a platform that was 490 cm long to their caregiver with a toy or stimulus at the end. The platform and the curtain behind the caregiver had marked stripes that

The caregiver at the end of the platform used a toy at various levels (above eye level, at eye level, and below eye level), and results concluded that the target location affected the crawlers and walkers differently. The second portion of this study focused on how their head position changed to assess their field of vision—head angle through analysis of eye height—in the walkers and crawlers groups. Eye height, though, is evidently higher for the walkers and lower for the crawlers. The participants in this part of the study were 13-month-old infants consisting of nine crawlers and six walkers. Neck angle was recorded to assess functional height for both groups via an additional sensor on the infant’s back in addition to the same technology and setup as the first part of the