Biomaterial Database

Adjustment of reaching to change in object position by young infants. 1979

P Willatts

4-month-old infants manipulated and fixated an object less when it was presented in a new rather than a familiar place. Evidence was also found for persistence of manipulation and fixation at the empty place previously occupied by the object. At 5 months, changing the position of an object had no effect on the manipulation and fixation of the same infants, and there were no signs of persistence of manipulation and fixation at the object's original place. A comparison is made between these changes in reaching and changes in tracking behavior. 2 hypotheses are considered to account for these changes, 1 based on the development of an object concept and the other on improvement of motor skill.

UI	MeSH Term	Description	Entries
D007223	Infant	A child between 1 and 23 months of age.	Infants
D009048	Motor Skills	Performance of complex motor acts.	Motor Skill,Skill, Motor,Skills, Motor
D009949	Orientation	Awareness of oneself in relation to time, place and person.	Cognitive Orientation,Mental Orientation,Psychological Orientation,Cognitive Orientations,Mental Orientations,Orientation, Cognitive,Orientation, Mental,Orientation, Psychological,Orientations,Orientations, Cognitive,Orientations, Mental,Orientations, Psychological,Psychological Orientations
D002657	Child Development	The continuous sequential physiological and psychological maturing of an individual from birth up to but not including ADOLESCENCE.	Infant Development,Development, Child,Development, Infant
D005556	Form Perception	The sensory discrimination of a pattern, shape, or outline.	Contour Perception,Contour Perceptions,Form Perceptions,Perception, Contour,Perception, Form,Perceptions, Contour,Perceptions, Form
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man