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Semantic Representation and Semantic Control: Evidence from The Camel and Cactus Test
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Orientador(es)
Resumo(s)
Semantic memory and its breakdown is a fundamental field of cognitive science, merging
theoretical models of semantic cognition, with its clinical implications in neural degradation and
cognitive deficits, and thus bridging the areas of cognitive psychology and neuroscience. The
Control Semantic Cognition framework has proposed that effective semantic cognition
comprises representation and control processes (Patterson et al., 2007). This study aims to
investigate the extent to which a widely used neuropsychological test of semantic impairment –
the Camel and Cactus Test (CCT) – enables to differentiate between these two semantic
functions. To address this issue, we collected, in a group of healthy young participants (n = 100),
a set of measures that index the representation and control demands of the CCT items. Then, we
analyzed the performance of patients with stroke aphasia (n = 82) as well as control groups (n =
158) in light of the acquired measures. The findings confirm that the CCT items vary in
representation and control requirements. Moreover, patients with stroke aphasia revealed worse
performance for items with greater semantic control demands. Results argue in favour of the
CSC framework by providing support for the specific impairment in semantic control in patients
with stroke aphasia. They also demonstrate that the CCT is a useful tool to identify semantic
control deficits. Semantic cognition is a complex cognitive process dependent on the proper
interaction of the representation and control systems, the individual measure and distinction of
which proves to be of paramount importance, in both clinical and investigation environments.
Descrição
Tese de mestrado, Ciência Cognitiva, 2022, Universidade de Lisboa, Faculdade de Ciências
Palavras-chave
Memória Semântica Representação Semântica Controlo Semântico Afasia por Acidente Vascular Cerebral Teste do Camelo e do Cato Teses de mestrado - 2023