@article{adolph_what_2003,
	title = {What changes in infant walking and why},
	volume = {74},
	issn = {0009-3920},
	url = {http://search.ebscohost.com/login.aspx?direct=true&db=psyh&AN=2003-02636-011&site=ehost-live},
	doi = {10.1111/1467-8624.7402011},
	abstract = {This study compared the relative contributions of growing body dimensions, age, and walking experience in the development of walking skill in 9- to 17-month-old infants (N=210), 5-6-year old kindergartners (N=15), and college students (N=13). Kinematic measures derived from participants' footprints showed characteristic improvements in walking skill. As children became bigger, older, and more experienced, their steps became longer, narrower, straighter, and more consistent. Improvements reflected a narrowing base of support and increasing control over the path of progression. Although both infants' age and the duration of their walking experience contributed to improvements in walking skill, experience was the stronger predictor. This finding suggests that practice is the more important developmental factor for helping infants to conquer their weak muscles and precarious balance. (PsycINFO Database Record (c) 2016 APA, all rights reserved)},
	number = {2},
	journal = {Child Development},
	author = {Adolph, Karen E. and Vereijken, Beatrix and Shrout, Patrick E.},
	month = mar,
	year = {2003},
	note = {Publisher: Blackwell Publishing},
	keywords = {Age Differences, Body Size, Child, Child Development, Child, Preschool, Childhood Development, Cross-Sectional Studies, Experience Level, Female, Follow-Up Studies, Humans, Infant, Infant Development, Male, Motor Skills, Prospective Studies, Walking, Walking*, age, college students, development, growing body dimensions, infants, kindergartners, walking experience, walking skill},
	pages = {475--497},
}

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Improvements reflected a narrowing base of support and increasing control over the path of progression. Although both infants' age and the duration of their walking experience contributed to improvements in walking skill, experience was the stronger predictor. This finding suggests that practice is the more important developmental factor for helping infants to conquer their weak muscles and precarious balance. 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Kinematic measures derived from participants' footprints showed characteristic improvements in walking skill. As children became bigger, older, and more experienced, their steps became longer, narrower, straighter, and more consistent. Improvements reflected a narrowing base of support and increasing control over the path of progression. Although both infants' age and the duration of their walking experience contributed to improvements in walking skill, experience was the stronger predictor. This finding suggests that practice is the more important developmental factor for helping infants to conquer their weak muscles and precarious balance. 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