Lexical effects in left neglect dyslexia: A study in Italian patients

Lisa S. Arduino, Cristina Burani, Giuseppe Vallar

Research output: Contribution to journalArticle

Abstract

This study investigated whether and to what extent the reading performance of six Italian right-brain-damaged patients with left neglect dyslexia was affected by lexical variables. The lexicality of responses (either words or nonwords) and the distribution of substitution vs. omission neglect errors were measured. Patients were given the following tasks: (1) reading aloud monomorphemic words of different frequencies and nonwords with different degrees of similarity to real words (Experiment 1); (2) reading aloud morphologically complex (suffixed) derived words and morphologically complex (suffixed) nonwords (Experiment 2). Patients could be distinguished in terms of their sensitivity to the lexical status of the target. Four patients exhibited lexicality effects in their reading performance, while two patients did not. The dissociation is discussed in terms of the interaction between defective visuospatial analysis, which characterises neglect, and higher-order lexical knowledge. The suggestion is made that lexical effects in neglect dyslexia reflect a relative preservation of visuospatial processing of the left side of the letter string, its absence a more severe neglect disorder. This interpretation of the occurrence of lexical effects in left neglect dyslexia in terms of severity of the spatial disorder is specific to the domain of reading, however, and does not extend to other manifestations of unilateral spatial neglect. Finally, the relationship between error type (omissions vs. substitutions) and the absence vs. presence of lexical effects is considered.

Original languageEnglish
Pages (from-to)421-444
Number of pages24
JournalCognitive Neuropsychology
Volume19
Issue number5
DOIs
Publication statusPublished - 2002

Fingerprint

Dyslexia
Reading
Dissociative Disorders
Neglect
Lexical Effect
Brain
Nonwords

ASJC Scopus subject areas

  • Psychology(all)
  • Cognitive Neuroscience
  • Experimental and Cognitive Psychology

Cite this

Lexical effects in left neglect dyslexia : A study in Italian patients. / Arduino, Lisa S.; Burani, Cristina; Vallar, Giuseppe.

In: Cognitive Neuropsychology, Vol. 19, No. 5, 2002, p. 421-444.

Research output: Contribution to journalArticle

Arduino, Lisa S. ; Burani, Cristina ; Vallar, Giuseppe. / Lexical effects in left neglect dyslexia : A study in Italian patients. In: Cognitive Neuropsychology. 2002 ; Vol. 19, No. 5. pp. 421-444.
@article{eb8fd68ea6e24c65a2e100c9377996a4,
title = "Lexical effects in left neglect dyslexia: A study in Italian patients",
abstract = "This study investigated whether and to what extent the reading performance of six Italian right-brain-damaged patients with left neglect dyslexia was affected by lexical variables. The lexicality of responses (either words or nonwords) and the distribution of substitution vs. omission neglect errors were measured. Patients were given the following tasks: (1) reading aloud monomorphemic words of different frequencies and nonwords with different degrees of similarity to real words (Experiment 1); (2) reading aloud morphologically complex (suffixed) derived words and morphologically complex (suffixed) nonwords (Experiment 2). Patients could be distinguished in terms of their sensitivity to the lexical status of the target. Four patients exhibited lexicality effects in their reading performance, while two patients did not. The dissociation is discussed in terms of the interaction between defective visuospatial analysis, which characterises neglect, and higher-order lexical knowledge. The suggestion is made that lexical effects in neglect dyslexia reflect a relative preservation of visuospatial processing of the left side of the letter string, its absence a more severe neglect disorder. This interpretation of the occurrence of lexical effects in left neglect dyslexia in terms of severity of the spatial disorder is specific to the domain of reading, however, and does not extend to other manifestations of unilateral spatial neglect. Finally, the relationship between error type (omissions vs. substitutions) and the absence vs. presence of lexical effects is considered.",
author = "Arduino, {Lisa S.} and Cristina Burani and Giuseppe Vallar",
year = "2002",
doi = "10.1080/02643290244000013",
language = "English",
volume = "19",
pages = "421--444",
journal = "Cognitive Neuropsychology",
issn = "0264-3294",
publisher = "Psychology Press Ltd",
number = "5",

}

TY - JOUR

T1 - Lexical effects in left neglect dyslexia

T2 - A study in Italian patients

AU - Arduino, Lisa S.

AU - Burani, Cristina

AU - Vallar, Giuseppe

PY - 2002

Y1 - 2002

N2 - This study investigated whether and to what extent the reading performance of six Italian right-brain-damaged patients with left neglect dyslexia was affected by lexical variables. The lexicality of responses (either words or nonwords) and the distribution of substitution vs. omission neglect errors were measured. Patients were given the following tasks: (1) reading aloud monomorphemic words of different frequencies and nonwords with different degrees of similarity to real words (Experiment 1); (2) reading aloud morphologically complex (suffixed) derived words and morphologically complex (suffixed) nonwords (Experiment 2). Patients could be distinguished in terms of their sensitivity to the lexical status of the target. Four patients exhibited lexicality effects in their reading performance, while two patients did not. The dissociation is discussed in terms of the interaction between defective visuospatial analysis, which characterises neglect, and higher-order lexical knowledge. The suggestion is made that lexical effects in neglect dyslexia reflect a relative preservation of visuospatial processing of the left side of the letter string, its absence a more severe neglect disorder. This interpretation of the occurrence of lexical effects in left neglect dyslexia in terms of severity of the spatial disorder is specific to the domain of reading, however, and does not extend to other manifestations of unilateral spatial neglect. Finally, the relationship between error type (omissions vs. substitutions) and the absence vs. presence of lexical effects is considered.

AB - This study investigated whether and to what extent the reading performance of six Italian right-brain-damaged patients with left neglect dyslexia was affected by lexical variables. The lexicality of responses (either words or nonwords) and the distribution of substitution vs. omission neglect errors were measured. Patients were given the following tasks: (1) reading aloud monomorphemic words of different frequencies and nonwords with different degrees of similarity to real words (Experiment 1); (2) reading aloud morphologically complex (suffixed) derived words and morphologically complex (suffixed) nonwords (Experiment 2). Patients could be distinguished in terms of their sensitivity to the lexical status of the target. Four patients exhibited lexicality effects in their reading performance, while two patients did not. The dissociation is discussed in terms of the interaction between defective visuospatial analysis, which characterises neglect, and higher-order lexical knowledge. The suggestion is made that lexical effects in neglect dyslexia reflect a relative preservation of visuospatial processing of the left side of the letter string, its absence a more severe neglect disorder. This interpretation of the occurrence of lexical effects in left neglect dyslexia in terms of severity of the spatial disorder is specific to the domain of reading, however, and does not extend to other manifestations of unilateral spatial neglect. Finally, the relationship between error type (omissions vs. substitutions) and the absence vs. presence of lexical effects is considered.

UR - http://www.scopus.com/inward/record.url?scp=0036330645&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036330645&partnerID=8YFLogxK

U2 - 10.1080/02643290244000013

DO - 10.1080/02643290244000013

M3 - Article

C2 - 20957547

AN - SCOPUS:0036330645

VL - 19

SP - 421

EP - 444

JO - Cognitive Neuropsychology

JF - Cognitive Neuropsychology

SN - 0264-3294

IS - 5

ER -