Letters

This Week's Letters

Science  01 Jul 2005:
Vol. 309, Issue 5731, pp. 51
DOI: 10.1126/science.309.5731.51a

Letters in This Issue

What Can Be Done To Stop the Decline?

Leon M. Lederman

Arguing About the Use of Stem Cells

Barry Bradford

Evangelical Biologists and Evolution

John C. Sutherland

Debating Whale Sanctuaries

Vassili Papastavrou and Russell Leaper. Response Leah R. Gerber, K. David Hyrenbach, Mark A. Zacharias

When Will the Oil Run Out?

Lindsey Grant

Recalculating Future Oil Reserves

David Ehrenfeld

Corrections and Clarifications

Technical Comment Abstracts

Technical Comment Abstracts

Comment on “Children Creating Core Properties of Language: Evidence from an Emerging Sign Language in Nicaragua”

Tommaso Russo and Virginia Volterra

Abstract: Senghas et al. (Reports, 17 Sept. 2004, p. 1779) presented Nicaraguan Sign Language as a language created by children who lacked exposure to a developed language. We stress the relevance of social and environmental factors in shaping language acquisition. The different communicative and linguistic inputs that elder and younger generations of Nicaraguans signers were exposed to could have influenced their task performance.

Full text at www.sciencemag.org/cgi/content/full/309/5731/56b

Response to Comment on “Children Creating Core Properties of Language: Evidence from an Emerging Sign Language in Nicaragua”

Ann Senghas, Asli Özyürek, Sotaro Kita

Abstract: Russo and Volterra suggest that emergent structures were introduced to Nicaraguan Sign Language by Spanish-speakers through expressive channels such as writing, gesturing without speaking, or mouthing. However, these sources do not contain the relevant language structures, nor do their patterns of availability match the intergenerational differences observed. It is more likely that children's learning processes shaped the language.

Full text at www.sciencemag.org/cgi/content/full/309/5731/56c

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