The temporal parameters of lexical access in dyslexia.
Item
-
Title
-
The temporal parameters of lexical access in dyslexia.
-
Identifier
-
AAI9521268
-
identifier
-
9521268
-
Creator
-
Egnal, Melanie.
-
Contributor
-
Advisers: David Swinney | Penny Prather
-
Date
-
1995
-
Language
-
English
-
Publisher
-
City University of New York.
-
Subject
-
Psychology, General | Psychology, Developmental
-
Abstract
-
According to the literature, dyslexia is a generalized linguistic coding deficiency arising at the point of lexical access. Recent theories have been emphasizing problems with temporal processing. Furthermore, recent research attests to temporal processing problems among Broca's aphasics manifesting in delayed patterns of automatic activation at the point of lexical access. While the acquired aphasias and the developmental dysphasias cannot be considered to be identical syndromes, there are parallels between them. In addition, dyslexia is postulated to be a later manifestation of developmental dysphasia. It was thus hypothesized that the temporal disruptions evidenced by dyslexics are a manifestation of the same delayed availability of lexical-semantic information found among Broca's aphasics. The aim of the present research was to examine the temporal parameters of automatic activation of both orthographic and lexical-semantic information among dyslexics at the point of lexical access.;3 Experiments were conducted to examine the temporal parameters of priming presumed to provide a measure of automatic activation. The first was a masked priming experiment which examined orthographic and lexical-semantic priming at the initial stage of lexical access. The second and third experiments used a continuous list paradigm to examine the temporal parameters of lexical access in both visual and auditory modalities. In the visual modality semantic priming was examined at ISIs 500, 800, 1100 and 1400 and in the auditory modality it was examined at SOAs 800, 1100 and 1400.;A sample of 24 dyslexic boys and 24 normal controls aged between 13 and 15 was used.;Results provided evidence of temporal processing delays among dyslexics in the auditory modality. In addition, there was suggestive evidence of temporal processing delays in the visual modality. There was no strong evidence, however, for delayed patterns of priming among dyslexics in either visual or auditory modalities. The fact that normal controls in the age group used in the present research primed at a later point along the temporal continuum than normal adults raised the possibility that ISIs/SOAs used were not long enough to capture priming among dyslexics. Directions for future research were discussed.
-
Type
-
dissertation
-
Source
-
PQT Legacy CUNY.xlsx
-
degree
-
Ph.D.
