“…At face value, the development of sensorimotor and verbal spatial abilities seems to be a case of discontinuous developmentsen sorimotor spatial abilities emerge in infancy and show rapid change thereafter (e.g., Acredolo, 1985;Newcombe, Huttenlocher, & Learmonth, 1999;Piaget, 1954), whereas verbal spatial abilities emerge much later, reaching profi ciency by 5 to 7 years of age (e.g., Craton, Elicker, Plumert, & Pick, 1990;Hermer-Vazquez, Spelke, & Katsnelson, 1999;Plumert, Ewert, & Spear, 1995;Plumert & Nichols-Whitehead, 1996). Consistent with this discontinuous view, Hermer-Vazquez, Moffet, and Munkholm (2001) showed that 5-to 7-year-old children encode spatial relations in new ways once they become profi cient at using spatial language. In particular, spatial language helps children combine geometric and nongeometric, featural information following a disorientation procedure that disrupts children's ability to use dead-reckoning to fi nd a hidden object.…”