PILKINGTON, Emma, SAGE, Karen, SADDY, Douglas and ROBSON, Holly (2019). When does lexical availability influence phonology? Evidence from Jargon reading and repetition. Language, Cognition and Neuroscience. [Article]
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Abstract
Jargon aphasia is a language disorder characterised by phonological and nonword error.
Errors are thought to arise when target segments are insufficiently activated, allowing
non-target or recently used phonology to intrude. Words which are more frequent and
familiar reside with greater degrees of activation and therefore should be less
susceptible to error. The current study tested this hypothesis in a group of ten people
with Jargon aphasia using single word repetition and reading aloud. Each task had two
lexicality conditions, one high and one low lexical availability word set. Measures of
nonword quantity, phonological accuracy and perseveration were used in group and
case series analyses. Results demonstrated that fewer nonwords were produced when
2
lexical availability was greater. However, lexicality effects on phonological accuracy and
perseveration were only observed in repetition in a sub-group of moderately impaired
individuals, demonstrating that lexical information does not consistently influence
phonological processing in Jargon aphasia.
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