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No description available.

The way in which subjects of different ages copy a complex design gives an indication of the relative levels of visual perception and the related developmental trend of overall cognitive development and left-right hemispheric functioning. The purpose of this study was to investigate the impact of severe to profound hearing loss on the above perceptive abilities. The subjects were chosen from the Oregon State School for the Deaf in Salem and ranged in age from 8 to 17. Additional personal characteristics were documented: sex, degree of hearing loss, age of onset of deafness, cause of deafness, other handicapping conditions, and handedness. The subjects were asked to first copy the Rey-Osterreith Complex Figure and then reproduce it from memory. Scores were derived from the graphic strategies used to initially start both reproductions, complete the initial drawing, and from the accuracy and error measurements. The hypotheses were formulated which allowed cross-tabulations between each of the scores and each of the personal characteristics. The results were subjected to chi-square tests, the Kruskal-Wallis H test, and two- and three-way analyses of variance. Differences were significant at the p < .10 level. The age of the subjects proved to be the most significant factor in the study. The youngest group used adult strategies to complete the drawing, but with more errors than would be expected from adults. Loss of efficiency was noted with the 11-13 year old group and then the expected trend of increased sophistication in perception with advanced age proved true for the three older age groups. It was suggested that the early dependence on vision in lieu of auditory stimulation was responsible for the early strengths of the youngest group. Also right-handed subjects used more complex graphic strategies than did the left-handed subjects. This finding was expected based on other studies concerning cerebral assymetries relative to handedness. The sex of the subject, however, had no main effect on the results. Some interactions among variables were noted. There were no significant differences relative to age, onset, degree of hearing loss, etilogy, or other handicapping conditions. / Graduation date: 1985

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Diss. (sammanfattning) Uppsala : Univ., 2001. / Härtill 5 uppsatser.

Thesis (Ph. D.)--University of Hong Kong, 2008. / Includes bibliographical references (leaf 309-342) Also available in print.

Thesis PlanA (M.S.)--University of Wisconsin--Stout, 2008. / Includes bibliographical references.

Thesis--Copenhagen. / Translated from Danish by Mrs. Clara Packness. Summary also in Danish. "The work has also appeared as Supplement No. XXXVI to Acta oto-laryngologica." Bibliography: p. [145]-150.