This study examined the development of global motion perception and contrast sensitivity in infants aged 3 to 7 months compared to adults. The results showed that contrast sensitivity significantly improved with age from 3 to 7 months and was lower in infants compared to adults. However, coherence sensitivity, or the ability to perceive global motion, did not significantly change over infancy and was not statistically different from adults. This suggests that global motion perception may mature early in development but depends on improvements in lower-level contrast sensitivity that continues to develop into the first year of life.