Semantic Diversity Accounts for the “Missing” Word Frequency Effect in Stroke Aphasia: Insights Using a Novel Method to Quantify Contextual Variability in Meaning

@article{Hoffman2011SemanticDA,
  title={Semantic Diversity Accounts for the “Missing” Word Frequency Effect in Stroke Aphasia: Insights Using a Novel Method to Quantify Contextual Variability in Meaning},
  author={Paul Hoffman and Timothy T. Rogers and Matthew A. Lambon Ralph},
  journal={Journal of Cognitive Neuroscience},
  year={2011},
  volume={23},
  pages={2432-2446}
}
Word frequency is a powerful predictor of language processing efficiency in healthy individuals and in computational models. Puzzlingly, frequency effects are often absent in stroke aphasia, challenging the assumption that word frequency influences the behavior of any computational system. To address this conundrum, we investigated divergent effects of frequency in two comprehension-impaired patient groups. Patients with semantic dementia have degraded conceptual knowledge as a consequence of… CONTINUE READING

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