The puzzle of working memory for sign language

Why is immediate-serial-recall (short-term memory) span consistently shorter for sign language than it is for speech? A new study by Boutla et al. shows that neither the length of signs, nor the formational similarity of signed digits, can account for the difference. Their results suggest instead that the answer lies in differences between the auditory and visual systems. At the same time, however, their results show that sign language and spoken language yield equivalent processing spans, suggesting that reliance on immediate-serial-recall measures in clinical and educational testing is misplaced.

[1]  R. Hastie,et al.  Interevent relationships and judgment under uncertainty: Structure determines strategy , 2002, Memory & cognition.

[2]  R. Mayberry,et al.  First-language acquisition after childhood differs from second-language acquisition: the case of American Sign Language. , 1993, Journal of speech and hearing research.

[3]  M. Shadlen,et al.  Response of Neurons in the Lateral Intraparietal Area during a Combined Visual Discrimination Reaction Time Task , 2002, The Journal of Neuroscience.

[4]  Daniel Houser,et al.  A functional imaging study of cooperation in two-person reciprocal exchange , 2001, Proceedings of the National Academy of Sciences of the United States of America.

[5]  Elizabeth Jefferies,et al.  A category-specific advantage for numbers in verbal short-term memory: Evidence from semantic dementia , 2004, Neuropsychologia.

[6]  Nick C. Ellis,et al.  A bilingual word‐length effect: Implications for intelligence testing and the relative ease of mental calculation in Welsh and English , 1980 .

[7]  K. Emmorey.  Language, Cognition, and the Brain: Insights From Sign Language Research , 2001 .

[8]  Margaret Wilson.  The case for sensorimotor coding in working memory , 2001, Psychonomic bulletin & review.

[9]  W. Schultz.  Getting Formal with Dopamine and Reward , 2002, Neuron.

[10]  A. Tversky,et al.  Support theory: A nonextensional representation of subjective probability. , 1994 .

[11]  K. Emmorey,et al.  Working Memory for Sign Language : A Window Into the Architecture of the Working Memory System , 2005 .

[12]  Derek J. Koehler,et al.  A Strength Model of Probability Judgments for Tournaments , 1996 .

[13]  C. Fox.  Strength of Evidence, Judged Probability, and Choice Under Uncertainty , 1999, Cognitive Psychology.

[14]  M N Shadlen,et al.  Motion perception: seeing and deciding. , 1996, Proceedings of the National Academy of Sciences of the United States of America.

[15]  Daphne Bavelier,et al.  Short-term memory span: insights from sign language , 2004, Nature Neuroscience.

[16]  C. Moorehead.  All rights reserved , 1997 .

[17]  Michael L. Platt,et al.  Neural correlates of decision variables in parietal cortex , 1999, Nature.

[18]  Rachel I. Mayberry,et al.  The long-lasting advantage of learning sign language in childhood: Another look at the critical period for language acquisition , 1991 .

[19]  C. P. Beaman,et al.  The object-oriented episodic record model , 1996 .

[20]  J. Gold,et al.  Neural computations that underlie decisions about sensory stimuli , 2001, Trends in Cognitive Sciences.

[21]  Margaret Wilson,et al.  The effect of irrelevant visual input on working memory for sign language. , 2003, Journal of deaf studies and deaf education.

[22]  W. Newsome,et al.  Neural basis of a perceptual decision in the parietal cortex (area LIP) of the rhesus monkey. , 2001, Journal of neurophysiology.

[23]  James W. Stigler,et al.  Digit memory in Chinese and English: Evidence for a temporally limited store , 1986, Cognition.

[24]  E. Klima,et al.  Modality of language shapes working memory: evidence from digit span and spatial span in ASL signers. , 1997, Journal of deaf studies and deaf education.

[25]  W. Schultz,et al.  Discrete Coding of Reward Probability and Uncertainty by Dopamine Neurons , 2003, Science.

[26]  W. Stokoe,et al.  Sign language structure: an outline of the visual communication systems of the American deaf. 1960. , 1961, Journal of deaf studies and deaf education.

[27]  P. Montague,et al.  Neural Economics and the Biological Substrates of Valuation , 2002, Neuron.

[28]  U. Bellugi,et al.  A comparison of sign language and spoken language , 1972 .

[29]  Susan E. Gathercole,et al.  Models Of Short-Term Memory , 1996 .

[30]  D. D. de Quervain,et al.  The Neural Basis of Altruistic Punishment , 2004, Science.