TY - JOUR
T1 - Egocentric action in early infancy
T2 - Spatial Frames of Reference for Saccades
AU - Gilmore, Rick O.
AU - Johnson, Mark H.
N1 - Funding Information:
We gratefully acknowledge the financial support of the National Science Foundation. Grant DB 9120433, the U.K. Medical Research Council, and a Grant-in-Aid of Research from the National Academy of Sciences, and the contributions of Christine Gundlach, Leslie Tucker, Sarah Minister, Amy O'Malley, and Aditi Shankardass.
PY - 1997/5
Y1 - 1997/5
N2 - The extent to which infants combine visual (i.e., retinal position) and nonvisual (eye or head position) spatial information in planning saccades relates to the issue of what spatial frame or frames of reference influence early visually guided action. We explored this question by testing infants from 4 to 6 months of age on the double-step saccade paradigm, which has shown that adults combine visual and eye position information into an egocentric (head- or trunk-centered) representation of saccade target locations. In contrast, our results imply that infants depend on a simple retinocentric representation at age 4 months, but by 6 months use egocentric representations more often to control saccade planning. Shifts in the representation of visual space for this simple sensorimotor behavior may index maturation in cortical circuitry devoted to visual spatial processing in general.
AB - The extent to which infants combine visual (i.e., retinal position) and nonvisual (eye or head position) spatial information in planning saccades relates to the issue of what spatial frame or frames of reference influence early visually guided action. We explored this question by testing infants from 4 to 6 months of age on the double-step saccade paradigm, which has shown that adults combine visual and eye position information into an egocentric (head- or trunk-centered) representation of saccade target locations. In contrast, our results imply that infants depend on a simple retinocentric representation at age 4 months, but by 6 months use egocentric representations more often to control saccade planning. Shifts in the representation of visual space for this simple sensorimotor behavior may index maturation in cortical circuitry devoted to visual spatial processing in general.
UR - http://www.scopus.com/inward/record.url?scp=0347934811&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0347934811&partnerID=8YFLogxK
U2 - 10.1111/j.1467-9280.1997.tb00416.x
DO - 10.1111/j.1467-9280.1997.tb00416.x
M3 - Article
AN - SCOPUS:0347934811
SN - 0956-7976
VL - 8
SP - 224
EP - 230
JO - Psychological Science
JF - Psychological Science
IS - 3
ER -