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The Validity of Perceptual Deficit Explanations of Reading Disability: A Reply to Fletcher and Satz.
Peer reviewed Peer reviewed
Vellutino, Frank R. – Journal of Learning Disabilities, 1979
In the article the author refutes J. Fletcher and P. Satz's analysis of the etiology of reading disability on logical, theoretical, and empirical grounds. (Author/PHR)
Descriptors: Etiology, Exceptional Child Research, Hypothesis Testing, Learning Disabilities
Has Vellutino Led Us Astray? A Rejoinder to a Reply.
Peer reviewed Peer reviewed
Fletcher, Jack M.; Satz, Paul – Journal of Learning Disabilities, 1979
In the rejoinder the authors describe the methodological and interpretive factors in the Vellutino et al, experiments which limited the degree to which the studies refuted perceptual deficit hypotheses of reading disability. Note: for more of the interchange see EC 114 687-688. (Author/PHR)
Descriptors: Etiology, Exceptional Child Research, Hypothesis Testing, Learning Disabilities
The Possible Relationship between Visual Deficits and Dyslexia: Examination of a Critical Assumption.
Peer reviewed Peer reviewed
Skottun, Bernt C.; Parke, Lesley A. – Journal of Learning Disabilities, 1999
Examines the assumption that the parvocellular system is suppressed by the magnocellular system during saccadic eye movements and that this visual deficit is associated with dyslexia. Evidence from six studies indicates the magnocellular system is suppressed during saccadic eye movements, disproving the magnocellular deficit theory of dyslexia.…
Descriptors: Adults, Children, Dyslexia, Etiology
An Appraisal of the Irlen Technique of Correcting Reading Disorders Using Tinted Overlays and Tinted Lenses.
Peer reviewed Peer reviewed
Solan, Harold A. – Journal of Learning Disabilities, 1990
The article reviews three studies (EC 600 064-066) evaluating the effectiveness of using Irlen tinted lenses or overlays with reading-disabled persons. It is concluded that carefully designed and controlled studies do not currently lend support to the Irlen hypothesis. (DB)
Descriptors: Color, Elementary Secondary Education, Eyes, Intervention
Irlen Lenses and Reading Difficulties.
Peer reviewed Peer reviewed
Hoyt, Creig S. – Journal of Learning Disabilities, 1990
The article reviews three studies (EC 600 064-066) evaluating the effectiveness of using Irlen tinted lenses with reading-disabled persons. The studies are individually critiqued, and recommendations are offered concerning the methodology of further research. Stressed is the need to determine whether a specific syndrome of scotopic sensitivity…
Descriptors: Elementary Secondary Education, Intervention, Outcomes of Treatment, Reading Difficulties
An Examination of Methods Used to Test the Visual Perceptual Deficit Hypothesis of Dyslexia.
Peer reviewed Peer reviewed
Gross, Karen; Rothenberg, Stephen – Journal of Learning Disabilities, 1979
Two methodological problems often arising in dyslexia research are considered. The first problem concerns the validity of experimental measures and the related problem of interpreting null results. The second problem involves the effects of sampling from a disabled population if the disorder under investigation has multiple unknown origins.…
Descriptors: Cognitive Processes, Dyslexia, Hypothesis Testing, Learning Disabilities
Visual and Auditory Temporal Processing, Cross-Modal Transfer, and Reading.
Peer reviewed Peer reviewed
Rose, Susan A.; Feldman, Judith F.; Jankowski, Jeffery J.; Futterweit, Lorelle R. – Journal of Learning Disabilities, 1999
This study reexamined the relationship of auditory and visual cross-modal matching to reading ability in 90 11-year olds. Problems with the methodology of the original study were corrected. Results showed that poor readers had difficulty in perceiving temporal patterns generally and did worse in both cross-modal conditions and intramodal ones.…
Descriptors: Auditory Perception, Intermediate Grades, Multisensory Learning, Reading Ability