Science of Aphasia 5 Cross Linguistic Aspects of Aphasia ...
Science of Aphasia 5 Cross Linguistic Aspects of Aphasia ...
Science of Aphasia 5 Cross Linguistic Aspects of Aphasia ...
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Preliminary analyses <strong>of</strong> the first patient data <strong>of</strong> a study on the relation between phonological<br />
input and output disorders in aphasia<br />
Julia Klitsch & Roelien Bastiaanse<br />
Rijksuniversiteit Groningen (RuG),<br />
Graduate School <strong>of</strong> Behavioral and Cognitive Neuroscience (BCN)<br />
Previous research on the (nature <strong>of</strong> the) relation between phonological input and output disorders in aphasia has<br />
been controversial. While some researchers assume that impairments in the two modalities are associated and cooccuring,<br />
others observed dissociating performance patterns in the two modalities.<br />
The research question <strong>of</strong> this project is if and how phonological input and output disorders are related. Are<br />
phonological disorders in one modality predictive <strong>of</strong> disorders in the other or are input and output dissociable?<br />
Another question is if there are phonetic features that are more detrimental to aphasic speech perception than<br />
others.<br />
To assess these questions, spontaneous speech is collected and the patients are administered a number perceptual<br />
tasks from the Dutch PALPA test battery (Bastiaanse, Bosje, & Visch-Brink, 1995) that tap different processing<br />
stages on the perceptual side <strong>of</strong> a Logogen-like model (Morton, 1968; Patterson, 1988): Auditory discrimination<br />
<strong>of</strong> words and non words, auditory lexical decision, auditory-written word matching, and auditory word-picture<br />
matching. Furthermore, expressive data are elicited with an oral naming task, using the target pictures <strong>of</strong> the<br />
auditory word-picture matching task as stimulus material, and with a repetition task. In the latter, the same words<br />
and non words have to be repeated which are also used in the auditory lexical decision task.<br />
Preliminary analyses <strong>of</strong> the data <strong>of</strong> the first four patients showed a lexical superiority effect in both auditory<br />
discrimination tasks, in auditory lexical decision, and in repetition, suggesting involvement <strong>of</strong> the lexical<br />
processing routes. A frequency effect could be observed in the repetition task only (χ2(1)=5.6, p
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