The Hoffer-Osmond Diagnostic Test of Perceptual Disorders and the Academic Achievement of Indian and Metis Students in Northern Saskatchewan
Kowalchuk, Mervin Paul
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The purpose of this study was to administer to Indian and Metis student in northern Saskatchewan, the Hoffer-Osmond Diagnostic Test ,which,purports to measure perceptual disorders, and to relate the HOD scores to criteria such as age, sex, academic achievement and the menstrual cycle. The sample consisted of three hundred and four male and female subjects between the ages of twelve and eighteen. Seven hypotheses were proposed. The Hoffer-Osmond Diagnostic Test consists of one hundred and forty-five true and false questions which are designed to measure visual, auditory, olfactory, touch, taste and time perception. High HOD scores indicate abnormality. The greater the degree of distortion evident in these areas, the greater the probability the individual suffers from subclinical pellagra, a term recently introduced to refer to these perceptual abnormalities. Previous data indicate that perceptual disorders interfere with learning. The results of this investigation and those of previous studies provide evidence as to the feasibility of using the HOD as a diagnostic tool for detecting perceptual changes which are associated with learning and behavioral problems. The findings clearly indicate that subjects with high HOD scores were also experiencing academic difficulties. 1. The mean HOD scores of female subjects were significantly higher than the mean HOD scores of male subjects. 2. The mean HOD scores decreased significantly as age increased. 3. The mean HOD scores of those students who passed their grade were significantly lower than the mean HOD scores of those who failed or quit their grade. 4. The mean HOD scores decreased significantly as average marks increased. 5. The mean HOD scores increased significantly as age-grade differences increased. 6. The mean HOD scores of those students referred to the educational psychologist were higher than the mean HOD scores of those students not referred, although this difference was not statistically significant. 7. The mean HOD scores of female subjects taking the test during paramenstrum were significantly higher than the mean HOD scores of female subjects taking the test not during paramenstrum.