Part-based representations of the body in early childhood: evidence from perceived distortions of tactile space across limb boundaries

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Le Cornu Knight, F. ; Cowie, D. ; Bremner, A. J. (2016)
  • Publisher: Blackwell

Studies show that touch in adults is referenced to a representation of the body that is structured topologically according to body parts; the perceived distance between two stimuli crossing over a body part boundary is elongated relative to the perceived distance between two stimuli presented within one body part category. Here we investigate this influence of body parts on tactile space perception in children of five, six and seven years of age. We presented children with pairs of tactile stimuli on the left hand/arm, either within the hand, within the forearm, or over the wrist. With their eyes closed children were asked to adjust the distance between the thumb and forefinger of their right hand to represent the felt distance between the two tactile stimuli. Like adults, the children perceived the distance between two stimuli that cross the body part boundary to be further apart than those that were presented within the hand or arm. They also perceive tactile distance to be greater on the hand than the arm which is the first observation of Weber’s illusion in young children. We propose that a topological mode of body representation is particularly advantageous during early life given that body part categories remain constant while the metric proportions of the body change substantially as the child grows.
  • References (7)

    Assaiante, C., & Amblard, B. (1995). An ontogenetic model for the sensorimotor organization of balance control in humans. Human Movement Science, 14, 13- 43.

    Begum Ali, J., Spence, C., & Bremner, A. J. (2015). Human infants' ability to perceive touch in external space develops postnatally. Current Biology, 25, R978-R979.

    Bermúdez, J. L., Marcel, A., & Eilan, N. (1998). The body and the self. Cambridge, MA: MIT Press.

    Berthier, N. E., Clifton, R. K., McCall, D., & Robin, D. (1999). Proximodistal structure of early reaching in human infants. Experimental Brain Research, 127, 259-269.

    Bornstein, M. H., Kessen, W., & Weiskopf, S. (1976). Color vision and hue categorization in young human infants. Journal of Experimental Psychology: Human Perception and Performance, 2, 115-129.

    Brownell, C. A., Nichols, S. R., Svetlova, M., Zerwas, S., & Ramani. G. (2010). The head bone's connected to the neck bone: When do toddlers represent their own body topography? Child Development, 81, 797-810.

    Buxbaum, L. J., & Coslett, H. B. (2001). Specialised structural descriptions for human body parts: Evidence from autotopagnosia. Cognitive Neuropsychology, 18, 289-306.

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