The relationship between hemispheric laterality and perception of musical and verbal stimuli in normal and learning disabled subjects / by Alan D. Strong.
| Author/creator | Strong, Alan D. |
| Format | Book |
| Publication Info | [Bloomington] : Indiana University, 1990 ; [Ann Arbor] : [University Microfilms], [1993] |
| Description | x, 173 leaves : illustrations ; 28 cm |
| Subjects |
| Contents | Introduction. Hemispheric laterality in the normal population ; Hemispheric laterality in the LD population ; Musical perception in the LD population -- Review of literature. Hemispheric laterality in the normal population ; Investigations of hemispheric laterality ; Theories of hemispheric laterality ; Hemispheric laterality for verbal stimuli ; Hemispheric laterality for music ; Hemispheric laterality in the LD population ; Current theories of hemispheric laterality in the LD population ; Tests of hemispheric lateralization among the learning disabled ; Musical perception in the LD population ; Test of cognitive skills ; LD subtypes in relation to hemispheric laterality ; Additional factors ; Contrasts between normal and LD subjects -- Methodology -- Results and discussion -- Summary and conclusions. |
| Summary | The purpose of this study was to examine the relationship between hemispheric laterality and the perception of musical and verbal stimuli in normal and learning disabled (LD) subjects. Primary research questions were: (1) is there a difference between the normal and LD populations in their hemispheric specialization for music and verbal stimuli?; and (2) are differences in hemispheric specialization for music perception related to the nature of the musical stimuli? Secondary research questions addressed the relationships between hemispheric specialization for verbal and musical stimuli and: (1) specific subject characteristics such as age and handedness; and (2) the difference between expected and actual achievement level. Dichotic listening tests were constructed to examine hemispheric lateralization for musical and verbal stimuli in normal and LD subjects, from grades one through four. In the verbal test, pairs of consonant-vowel syllables were presented dichotically with white noise as the competing stimulus. Subjects' task was to identify the syllables heard. Two musical tests included a tonal and a rhythmic test, utilizing stimuli drawn from the primary measures of music audiation (PMMA; Gordon, 1979) and intermediate measures of music audiation (IMMA; Gordon, 1982). Each musical test was divided into three subtests, with stimuli categorized as easy, moderately difficult, or difficult. The rhythmic or tonal patterns were presented dichotically with white noise as the competing stimulus. Subjects' task was to identify the patterns as same or different. Data regarding IQ, reading and math achievement levels, and handedness were also analyzed for each subject. The results of multivariate analysis of variance (MANOVA) procedures were as follows: (a) significant differences among subject groups were revealed in terms of the magnitude (through AEA values) but not direction of laterality; (b) AEA values were found to be significantly greater for the LD subjects than for the normal subjects on the verbal identification and composite tonal tests and the difficult rhythm subtest; (c) AEA values were significantly greater for the younger than for the older subjects on the easy and moderately difficult tonal subtests. |
| Dissertation note | Ed. D. Indiana University 1990. |
| Bibliography note | Includes bibliographical references (leaves 156-171). |
| Reproduction note | Joyner- Photocopy. Ann Arbor, Mich. : University Microfilms International, 1993. 21 cm. |