Lexical Representation and Processing of Morphologically Complex Words: Evidence from the Reading Performance of an Italian Agrammatic Patient

The study of patients with acquired language disorders has provided crucial evidence for contemporary theories on mental lexical representation. This is particularly true for the representation of morphologically complex words. In this paper we analyzed the performance of a patient (M.B.) affected b...

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Bibliographic Details
Published in:Brain and language 2001-12, Vol.79 (3), p.345-359
Main Authors: Luzzatti, Claudio, Mondini, Sara, Semenza, Carlo
Format: Article
Language:English
Subjects:
Adult
Adult and adolescent clinical studies
agrammatism
Aphasia, Broca - diagnosis
Biological and medical sciences
Brain - diagnostic imaging
Brain - physiopathology
complex words
Dyslexia - diagnosis
Humans
inflectional morphology
Key Words: dual route model
Language
Language and communication disorders
lexical morphology
Male
Medical sciences
morphological processing
Neuropsychological Tests
Organic mental disorders. Neuropsychology
Phonetics
phonological dyslexia
Psychology. Psychoanalysis. Psychiatry
Psychopathology. Psychiatry
Severity of Illness Index
Tomography, X-Ray Computed
Vocabulary
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Summary:The study of patients with acquired language disorders has provided crucial evidence for contemporary theories on mental lexical representation. This is particularly true for the representation of morphologically complex words. In this paper we analyzed the performance of a patient (M.B.) affected by agrammatism and dyslexia. M.B. was required to read aloud simple and morphologically complex words. The patient's pattern of errors was interpreted as the result of a predominant use of the lexical routine (phonological dyslexia). Three reading tasks were developed which allowed us to test M.B.'s ability to read morphologically complex words (reading of regular and irregular plurals; reading of high- and low-frequency singular and plural nouns; reading of evaluative suffixes). Errors were determined by frequency effect rather than by type of suffix (i.e., inflectional or derivational). High-frequency morphologically complex items seemed to meet stored representations, thus avoiding the parsing procedures that are required for less frequent items. These results are in keeping with dual route models of lexical representation of morphologically complex words.
ISSN:0093-934X
1090-2155
DOI:10.1006/brln.2001.2475