In research on infants ascending stairs, most infants first ascended by crawling, using their hands and knees, or in some cases their hands and feet.

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Research on infant locomotion has shown that most infants initially ascend stairs by crawling, using their hands and knees, and in some cases, they may use their hands and feet, as this method provides them with better stability and safety during their early attempts at navigating stairs.

In Research on Infants Ascending Stairs, Most Infants First Ascended