Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multiplex networks quantify robustness of the mental lexicon to
  catastrophic concept failures, aphasic degradation and ageing   Concepts and their mental associations influence how language is processed
and used. Networks represent powerful models for exploring such cognitive
system, known as mental lexicon. This study investigates lexicon robustness to
progressive word failure with multiplex network attacks. The average lexicon of
an adult English speaker is built by considering 16000 words connected through
semantic free associations and phonological sound similarities. Progressive
structural degradation is modelled as random and targeted attacks. Words with
higher psycholinguistic features (e.g. frequency, length, age of acquisition,
polysemy) or network centrality (e.g. closeness, PageRank, betweenness and
degree) are targeted first. Aphasia-inspired attacks are introduced here and
target first words named correctly, more or less frequently, by patients with
anomic aphasia, a pathology disrupting word finding. Robustness is measured as
connectedness, fundamental for activation spreading and lexical retrieval, and
viability, a multi-layer connectivity identifying language kernels. The lexicon
is resilient to random, aphasia-inspired and psycholinguistic attacks.
Catastrophic phase transitions happen when phonological and semantic degrees
are combined, making the lexicon fragile to multidegree attacks. The viable
kernel is fragile to multi-PageRank and to aphasia-inspired attacks.
Consequently, connectedness in the lexicon is mediated by hubs, whereas
viability enables a lexical semantic/phonological interplay and corresponds to
a facilitative naming effect in aphasia. These effects persist also through
ageing, in different network representations of younger and older lexicons.
This study indicates the need to prevent failure of high multidegree and viable
words in the mental lexicon when pursuing the design of effective language
restoration strategies against cognitive impairing.

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The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: funct-an
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The categories of this paper are: gr-qc
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The categories of this paper are: patt-sol
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The categories of this paper are: econ
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The categories of this paper are: math-ph
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The categories of this paper are: acc-phys