@Article{Frank2008,
  author   = {Michael C Frank and Daniel L Everett and Evelina Fedorenko and Edward Gibson},
  journal  = {Cognition},
  title    = {Number as a cognitive technology: {E}vidence from {P}irah" language and cognition.},
  year     = {2008},
  number   = {3},
  pages    = {819-24},
  volume   = {108},
  abstract = {Does speaking a language without number words change the way speakers
	of that language perceive exact quantities? The Pirah" are an Amazonian
	tribe who have been previously studied for their limited numerical
	system [Gordon, P. (2004). Numerical cognition without words: Evidence
	from Amazonia. Science 306, 496-499]. We show that the Pirah" have
	no linguistic method whatsoever for expressing exact quantity, not
	even "one." Despite this lack, when retested on the matching tasks
	used by Gordon, Pirah" speakers were able to perform exact matches
	with large numbers of objects perfectly but, as previously reported,
	they were inaccurate on matching tasks involving memory. These results
	suggest that language for exact number is a cultural invention rather
	than a linguistic universal, and that number words do not change
	our underlying representations of number but instead are a cognitive
	technology for keeping track of the cardinality of large sets across
	time, space, and changes in modality.},
  doi      = {10.1016/j.cognition.2008.04.007},
  keywords = {18547557},
}

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