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Related Experiment Video

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Multimedia Battery for Assessment of Cognitive and Basic Skills in Mathematics (BM-PROMA)
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Multimedia Battery for Assessment of Cognitive and Basic Skills in Mathematics (BM-PROMA)

Published on: August 28, 2021

Specific order impairment in arabic number writing: A case-study.

Aliette Lochy1, Frank Domahs, Lisa Bartha

  • 1Universitatsklinik fur Neurologie, Innsbruck, Austria.

Cognitive Neuropsychology
|November 2, 2010
PubMed
Summary

This study investigated number transcoding deficits in an aphasic patient, revealing significant syntactic errors in writing Arabic numbers. Recovery involved improved handwriting fluency, suggesting distinct zero processing.

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Area of Science:

  • Neuropsychology
  • Cognitive Neuroscience
  • Linguistics

Background:

  • Transcoding deficits, particularly in converting verbal numbers to Arabic numerals, are a known consequence of aphasia.
  • Previous research highlights syntactic errors in number transcoding, but specific error patterns require further investigation.
  • Understanding these deficits offers insights into number representation and processing in the brain.

Purpose of the Study:

  • To examine a specific case of transitory verbal-to-Arabic number transcoding deficit in an aphasic patient (TM).
  • To analyze the nature and frequency of errors, focusing on syntactic and order errors in number writing.
  • To explore the potential origins of these errors within existing models of number transcoding and assess recovery using kinematic analysis.

Main Methods:

  • Case study of aphasic patient TM, focusing on verbal-to-Arabic number transcoding to dictation.
  • Analysis of error types, categorizing them by syntactic and order errors.
  • Kinematic assessment of handwriting using a digitizing tablet before and after recovery.

Main Results:

  • Patient TM exhibited a significant deficit (75% errors) in writing Arabic numbers from dictation, primarily syntactic (60%) and unusual order errors (50%).
  • Order errors involved incorrect placement of lexical digits and zeros, with numbers often retaining the correct digit count.
  • Post-recovery kinematic analysis showed normalized handwriting fluency and supported a distinction between different types of zeros in Arabic numbers.

Conclusions:

  • The findings support hypotheses linking transcoding deficits to syntactic disorders, particularly in number production.
  • The study highlights the specific nature of order errors in number transcoding and their potential link to syntactic processing.
  • Kinematic analysis with digitizing tablets proves valuable for studying transcoding deficits and understanding number representation, including distinct zero processing.