Developmental change in young childrens use of haptic information in a visual task: The role of hand movements

摘要

Preschoolers who explore objects haptically often fail to recognize those objects in subsequent visual tests. This suggests that children may represent qualitatively different information in vision and haptics, and/or that children's haptic perception may be poor. Seventy-two children from 2 ½ to 5 years and 20 adults explored unfamiliar objects either haptically or visually, then chose a visual match from among three test objects, each matching the exemplar on one perceptual dimension. All age groups chose shape-based matches after visual exploration. Five-year-olds and adults also chose shape-based matches after haptic exploration, but younger children did not match consistently in this condition. Certain hand movements performed by children during haptic exploration reliably predicted shape-based matches but occurred at very low frequencies. Thus, younger children's difficulties with haptics-to-vision information transfer appeared to stem from their failure to use their hands to obtain reliable haptic information about objects.