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Science 17 September 2004:
Vol. 305. no. 5691, pp. 1720 - 1721
DOI: 10.1126/science.1102894
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Perspectives

NEUROSCIENCE:
Signposts to the Essence of Language

Michael Siegal

Nicaraguan Sign Language (NSL), developed by deaf children in Managua over the past 35 years, has provided unprecedented insights into the innateness of language. In his Perspective, Siegal discusses the latest study of three age groups of NSL signers (Senghas et al.), which reveals that segmentation and sequencing, considered core properties of all languages, are clearly present in NSL.

The author is in the Department of Psychology, University of Sheffield, Sheffield S10 2TP, UK. E-mail: m.siegal{at}sheffield.ac.uk

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Science. ISSN 0036-8075 (print), 1095-9203 (online)