Biomaterial Database

Inter- versus intra-hemispheric learning in dyslexic and normal readers. 1978

F R Vellutino, and W L Bentley, and F Phillips

The present study investigated the hypothesis that developmental dyslexia is attributable to dysfunction in inter-hemispheric transfer. Dyslexic and normal readers in second grade (age-range seven to eight years) and sixth grade (11 to 12 years) were given tachistoscopic presentations of novel visual stimuli (Chinese ideographs), randomly presented to the left and right visual fields and to the central fixation point. Each stimulus was paired with a common English word (spoken) and the children were asked to associate the two. The transmission deficit hypothesis predicts that poor and normal readers will be differentiated in the case of presentations to the right hemisphere (left visual field) but will not differ significantly in the case of presentations to the left hemisphere (right visual field). This hypothesis was not supported. Normal readers at both grade levels performed significantly better than poor readers in both visual-field presentations.

UI	MeSH Term	Description	Entries
D007839	Functional Laterality	Behavioral manifestations of cerebral dominance in which there is preferential use and superior functioning of either the left or the right side, as in the preferred use of the right hand or right foot.	Ambidexterity,Behavioral Laterality,Handedness,Laterality of Motor Control,Mirror Writing,Laterality, Behavioral,Laterality, Functional,Mirror Writings,Motor Control Laterality,Writing, Mirror,Writings, Mirror
D010153	Paired-Associate Learning	Learning in which the subject must respond with one word or syllable when presented with another word or syllable.	Learning, Paired-Associate,Learnings, Paired-Associate,Paired Associate Learning,Paired-Associate Learnings
D002648	Child	A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL.	Children
D003337	Corpus Callosum	Broad plate of dense myelinated fibers that reciprocally interconnect regions of the cortex in all lobes with corresponding regions of the opposite hemisphere. The corpus callosum is located deep in the longitudinal fissure.	Interhemispheric Commissure,Neocortical Commissure,Callosum, Corpus,Callosums, Corpus,Commissure, Interhemispheric,Commissure, Neocortical,Commissures, Interhemispheric,Commissures, Neocortical,Corpus Callosums,Interhemispheric Commissures,Neocortical Commissures
D004292	Dominance, Cerebral	Dominance of one cerebral hemisphere over the other in cerebral functions.	Cerebral Dominance,Hemispheric Specialization,Dominances, Cerebral,Specialization, Hemispheric
D004410	Dyslexia	A cognitive disorder characterized by an impaired ability to comprehend written and printed words or phrases despite intact vision. This condition may be developmental or acquired. Developmental dyslexia is marked by reading achievement that falls substantially below that expected given the individual's chronological age, measured intelligence, and age-appropriate education. The disturbance in reading significantly interferes with academic achievement or with activities of daily living that require reading skills. (From DSM-IV)	Alexia,Dyslexia, Developmental,Reading Disability, Developmental,Reading Disorder,Reading Disorder, Developmental,Developmental Reading Disorder,Word Blindness,Alexias,Blindness, Word,Blindnesses, Word,Developmental Dyslexia,Developmental Dyslexias,Developmental Reading Disabilities,Developmental Reading Disability,Developmental Reading Disorders,Disabilities, Developmental Reading,Disability, Developmental Reading,Disorder, Developmental Reading,Disorder, Reading,Disorders, Developmental Reading,Disorders, Reading,Dyslexias,Dyslexias, Developmental,Reading Disabilities, Developmental,Reading Disorders,Reading Disorders, Developmental,Word Blindnesses
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000367	Age Factors	Age as a constituent element or influence contributing to the production of a result. It may be applicable to the cause or the effect of a circumstance. It is used with human or animal concepts but should be differentiated from AGING, a physiological process, and TIME FACTORS which refers only to the passage of time.	Age Reporting,Age Factor,Factor, Age,Factors, Age
D014705	Verbal Behavior	Includes both producing and responding to words, either written or spoken.	Behavior, Verbal,Behaviors, Verbal,Verbal Behaviors
D014794	Visual Fields	The total area or space visible in a person's peripheral vision with the eye looking straightforward.	Field, Visual,Fields, Visual,Visual Field