| 1 |
Semantic diversity is best measured with unscaled vectors: Reply to Cevoli, Watkins and Rastle (2020). ...
|
|
|
|
BASE
|
|
Show details
|
|
|
| 2 |
Semantic diversity is best measured with unscaled vectors: Reply to Cevoli, Watkins and Rastle (2020).
|
|
|
|
BASE
|
|
Show details
|
|
|
| 3 |
Sleep Benefits Memory for Semantic Category Structure While Preserving Exemplar-Specific Information.
|
|
|
|
In: Scientific reports, vol 7, iss 1 (2017)
|
|
BASE
|
|
Show details
|
|
|
| 4 |
A unified model of human semantic knowledge and its disorders
|
|
|
|
BASE
|
|
Show details
|
|
|
| 5 |
Disorders of representation and control in semantic cognition : Effects of familiarity, typicality, and specificity
|
|
|
|
BASE
|
|
Show details
|
|
|
| 6 |
Impact of dialect use on a basic component of learning to read
|
|
|
|
BASE
|
|
Show details
|
|
|
| 7 |
Disorders of representation and control in semantic cognition: Effects of familiarity, typicality, and specificity
|
|
|
|
BASE
|
|
Show details
|
|
|
| 10 |
Premorbid expertise produces category-specific impairment in a domain-general semantic disorder
|
|
|
|
Abstract:
For decades, category-specific semantic impairment – i.e., better comprehension of items from one semantic category than another – has been the driving force behind many claims about the organisation of conceptual knowledge in the brain. Double dissociations between patients with category-specific disorders are widely interpreted as showing that different conceptual domains are necessarily supported by functionally independent systems. We show that, to the contrary, even strong or classical dissociations can also arise from individual differences in premorbid expertise. We examined two patients with global and progressive semantic degradation who, unusually, had known areas of premorbid expertise. Patient 1, a former automotive worker, showed selective preservation of car knowledge, whereas Patient 2, a former botanist, showed selective preservation of information about plants. In non-expert domains, these patients showed the typical pattern: i.e., an inability to differentiate between highly similar concepts (e.g., rose and daisy), but retention of broader distinctions (e.g., between rose and cat). Parallel distributed processing (PDP) models of semantic cognition show that expertise in a particular domain increases the differentiation of specific-level concepts, such that the semantic distance between these items resembles non-expert basic-level distinctions. We propose that these structural changes interact with global semantic degradation, particularly when expert knowledge is acquired early and when exposure to expert concepts continues during disease progression. Therefore, category-specific semantic impairment can arise from at least two distinct mechanisms: damage to representations that are critical for a particular category (e.g., knowledge of hand shape and action for the category ‘tools’) and differences in premorbid experience.
|
|
Keyword:
Article
|
|
URL: http://www.ncbi.nlm.nih.gov/pubmed/21816166
https://doi.org/10.1016/j.neuropsychologia.2011.07.024
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3192291
|
|
BASE
|
|
Hide details
|
|
|
| 11 |
Letting structure emerge: connectionist and dynamical systems approaches to cognition. ...
|
|
|
|
BASE
|
|
Show details
|
|
|
| 12 |
Letting structure emerge: connectionist and dynamical systems approaches to cognition. ...
|
|
|
|
BASE
|
|
Show details
|
|
|
| 13 |
Letting Structure Emerge: Connectionist and Dynamical Systems Approaches to Cognition
|
|
|
|
BASE
|
|
Show details
|
|
|
| 14 |
“Pre-semantic” cognition revisited: Critical differences between semantic aphasia and semantic dementia
|
|
|
|
BASE
|
|
Show details
|
|
|
| 15 |
Influence of Conceptual Knowledge on Visual Object Discrimination: Insights from Semantic Dementia and MTL Amnesia
|
|
|
|
BASE
|
|
Show details
|
|
|
|
|
