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Why Does Infant Stepping Disappear and Can It Be Stimulated by Optic Flow?

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Title: Why Does Infant Stepping Disappear and Can It Be Stimulated by Optic Flow?
Authors: Barbu‐Roth, Marianne, Anderson, David I., Streeter, Ryan J., Combrouze, Marie, Park, Juana, Schultz, Brooke, Campos, Joseph J., Goffinet, François, Provasi, Joëlle
Source: Child Development. Mar/Apr2015, Vol. 86 Issue 2, p441-455. 15p. 2 Illustrations, 1 Chart, 3 Graphs.
Subjects: Infants, Optical flow, Perceptual-motor processes, Human kinematics, Infant physiology, Infant psychology, Visuomotor coordination, Motor ability in infants, Walking
Abstract: Two independent experiments ( n = 22 and n = 22) showed that 2-month-old infants displayed significantly more stepping movements when supported upright in the air than when supported with their feet contacting a surface. Air- and surface-stepping kinematics were quite similar (Experiment 2). In addition, when data were collapsed across both experiments, more air steps and more donkey kicks were seen when infants were exposed to optic flows that specified backward compared to forward translation. The findings challenge the currently accepted heavy legs explanation for the disappearance of stepping at 2 months of age and raise new questions about the visual control of stepping. [ABSTRACT FROM AUTHOR]
Copyright of Child Development is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Why Does Infant Stepping Disappear and Can It Be Stimulated by Optic Flow?
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  Data: <searchLink fieldCode="AR" term="%22Barbu‐Roth%2C+Marianne%22">Barbu‐Roth, Marianne</searchLink><br /><searchLink fieldCode="AR" term="%22Anderson%2C+David+I%2E%22">Anderson, David I.</searchLink><br /><searchLink fieldCode="AR" term="%22Streeter%2C+Ryan+J%2E%22">Streeter, Ryan J.</searchLink><br /><searchLink fieldCode="AR" term="%22Combrouze%2C+Marie%22">Combrouze, Marie</searchLink><br /><searchLink fieldCode="AR" term="%22Park%2C+Juana%22">Park, Juana</searchLink><br /><searchLink fieldCode="AR" term="%22Schultz%2C+Brooke%22">Schultz, Brooke</searchLink><br /><searchLink fieldCode="AR" term="%22Campos%2C+Joseph+J%2E%22">Campos, Joseph J.</searchLink><br /><searchLink fieldCode="AR" term="%22Goffinet%2C+François%22">Goffinet, François</searchLink><br /><searchLink fieldCode="AR" term="%22Provasi%2C+Joëlle%22">Provasi, Joëlle</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Child+Development%22">Child Development</searchLink>. Mar/Apr2015, Vol. 86 Issue 2, p441-455. 15p. 2 Illustrations, 1 Chart, 3 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Infants%22">Infants</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+flow%22">Optical flow</searchLink><br /><searchLink fieldCode="DE" term="%22Perceptual-motor+processes%22">Perceptual-motor processes</searchLink><br /><searchLink fieldCode="DE" term="%22Human+kinematics%22">Human kinematics</searchLink><br /><searchLink fieldCode="DE" term="%22Infant+physiology%22">Infant physiology</searchLink><br /><searchLink fieldCode="DE" term="%22Infant+psychology%22">Infant psychology</searchLink><br /><searchLink fieldCode="DE" term="%22Visuomotor+coordination%22">Visuomotor coordination</searchLink><br /><searchLink fieldCode="DE" term="%22Motor+ability+in+infants%22">Motor ability in infants</searchLink><br /><searchLink fieldCode="DE" term="%22Walking%22">Walking</searchLink>
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  Data: Two independent experiments ( n = 22 and n = 22) showed that 2-month-old infants displayed significantly more stepping movements when supported upright in the air than when supported with their feet contacting a surface. Air- and surface-stepping kinematics were quite similar (Experiment 2). In addition, when data were collapsed across both experiments, more air steps and more donkey kicks were seen when infants were exposed to optic flows that specified backward compared to forward translation. The findings challenge the currently accepted heavy legs explanation for the disappearance of stepping at 2 months of age and raise new questions about the visual control of stepping. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Child Development is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1111/cdev.12305
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        Text: English
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      – SubjectFull: Walking
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      – TitleFull: Why Does Infant Stepping Disappear and Can It Be Stimulated by Optic Flow?
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              Text: Mar/Apr2015
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