Thesis (doctoral)--Lund University, 1998. / Added t.p. with thesis statement inserted. Includes bibliographical references.

Thesis (Ed. D.)--West Virginia University, 2002. / Title from document title page. Document formatted into pages; contains v, 110 p. Includes abstract. Includes bibliographical references (p. 81-92).

Thesis (Ph. D.)--University of Florida, 1984. / Description based on print version record. Typescript. Vita. Includes bibliographical references (leaves 67-74).

Thesis (PhD(Curriculum Studies))-University of Pretoria, 2005. / Includes bibliographical references. Available on the Internet via the World Wide Web.

Thesis (B.A. (Hons.)) - University of Queensland, 2006. / Includes bibliography.

M.A. (Psychology) / The goal of the present study was to determine whether there exist any differences in cognitive skills between left-handed dyslexic boys and righthanded dyslexic boys with left hemisphere speech representation. The comparison was made in terms of their verbal and visuo-spatial skills. The motivation for this study resulted from a hypothesis that was formulated by Geschwind and Behan (1982). The hypothesis states that there exists a difference in functional hemispheric asymmetry between left-handed and righthanded dyslexic boys with left hemispheric language representation. By virtue of their explanation of dyslexia in terms of a prenatal hyper secretion of the hormone called testosterone, Geschwind and Behan state that left-handed dyslexic boys will perform better than right-handed dyslexic boys on visuospatial tasks. An empirical study was performed in order to compare the verbal and visuospatial skills of left-handed and right-handed dyslexic boys. Twenty-six lefthanded and 26 right-handed dyslexic boys served as the experimental subjects. All the subjects had left hemispheric language representation. The selection of the experimental subjects was done by means of the dichotic listening technique as well as with the Harris test of lateral dominance. The nine subtests of the Senior South African Individual Scale-Revised served as measuring-instrument. The first five subscales represented the verbal cognitive skills. The visuo-spatial skills were measured with subtests six to nine. The data were statistically analysed by means of Hotelling's T2-test and Student's t-tests. The results indicated that there were no statistically significant differences between left-handed and right-handed dyslexic boys with left hemispheric language representation in terms of any of the verbal and visuo-spatial subtests. The relationship between hand preference, functional hemispheric asymmetry and dyslexia is elucidated by the present study which rejects the GeschwindBehan hypothesis that there exists a difference in functional hemispheric asymmetry between left-handed and right-handed dyslexic boys. A previous study (Hugdahl et aI., 1989) accepted this hypothesis. Further research is thus necessary in order to determine the validity of the Geschwind-Behan hypothesis.

This study investigated relationships between learning style, as measured by the Kolb Learning-Style Inventory, and brain hemisphere dominance, as measured by the Herrmann Participant Survey. The possible influence of either or both of these factors on organizational role selection as a supervisor, subordinate or work project group member was also studied. Subjects were 134 graduate management students. Pearson product moment correlations at p <.01 (n = 125) were found between the following dimensions: Concrete Experience and right brain hemisphere dominance, r = .41; Concrete Experience and the Right Limbic, r = .42; Abstract Conceptualization and left brain hemisphere dominance, r = .23; Abstract Conceptualization and the Overall Cerebral, r = .49; Abstract Conceptualization and the Left Cerebral, r = .42. Although some results regarding organizational role selection based on learning style or brain hemisphere dominance were significant at p <.05 using chi square analysis, strong evidence was not found to support the concept that individuals would prefer working with others like themselves. There was some evidence, however, that the longevity of the acquaintance may influence students to select right brain hemisphere dominant students in some situations. The bipolarity of the factors measured by both instruments was assessed. Using a level of p <.01, Concrete Experience and Abstract Conceptualization were correlated at -.46 (n = 133), whereas Reflective Observation and Active Experiementation were correlated at -.52 (n = 133) on the Kolb instrument. On the Herrmann instrument, Overall Left and Overall Right measures were correlated at -.84 (n = 126), whereas Overall Cerebral and Overall Limbic measures correlated at -.73 (n = 126). Split-half correlations on the Kofb factors yielded reliabilities of .85 to .90 (n = 133) for the four factors measured. Test-retest correlations for the Herrmann ranged from .67 to .81 (n=30) for the subscales. Suggestions for future research using these instruments were made.

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