Table of contents
| DECLARATION | i |
| ABSTRACT | ii |
| ACKNOWLEDGEMENTS | iii |
| TABLE OF CONTENTS | iv |
| LIST OF FIGURES | vii |
| Chapter 1: Introduction to the Research | 1 |
| 1.1: Statement of the Problem | 1 |
| 1.2: Purpose of the Study | 1 |
| 1.3: Null Hypothesis | 2 |
| 1.4: Definition of Terms | 2 |
| 1.5: Limitations of the Study | 6 |
| Chapter 2: Literature Review | 9 |
| 2.1: Introduction | 9 |
| 2.2: Anatomy of Sensory Modulation Disorder | 9 |
| 2.3: The Effects of SMD on the Individual | 12 |
| 2.4: Specific Research into SMD | 15 |
| 2.5: The Treatment of SMD | 16 |
| 2.6: What is Substance Abuse? | 17 |
| 2.7: Risk factors and Precursors to Substance Abuse | 17 |
| 2.8: Physiology of Substance Abuse | 18 |
| 2.9: Traditional Treatment Approaches to Substance abuse | 22 |
| 2.10: Conclusion | 22 |
| Chapter 3: Research Methodology | 23 |
| 3.1: Research Design | 23 |
| 3.2: Selection of Subjects | 23 |
| 3.3: Materials and Methods | 23 |
| 3.4: Control of Variables | 25 |
| 3.5: Collection of Data | 26 |
| 3.6: Data Analysis | 29 |
| Chapter 4: Results | 31 |
| 4.1: Total Sample Results | 31 |
| 4.2:Results Related to Clients who Presented with Problems in any Area | 35 |
| 4.3: Results Specific to Vestibular Hypersensitivity | 37 |
| 4.4: Results Specific to Vestibular Hyposensitivity | 38 |
| 4.5: Results Specific to the Substance Abuse Problem | 39 |
| 4.6: Conclusion | 46 |
| Chapter 5: Discussion | 47 |
| 5.1: Total Sample Discussion | 47 |
| 5.2: Discussion Related to clients who Presented with Problems in any Area | 48 |
| 5.3: Discussion specific to Vestibular Hypersensitivity | 49 |
| 5.4: Discussion Specific to Vestibular Hyposensitivity | 49 |
| 5.5: Discussion Related to the Substance Abuse Problem | 50 |
| 5.6: Conclusion | 51 |
| Chapter 6: Conclusions | 52 |
| 6.1: Summary of the Research | 52 |
| 6.2: Recommendations | 52 |
| References | 54 |
| appendices 1-6 | 56 |
List of figures
| figure | page |
| 1. Gender distribution for the total sample | 31 |
| 2. Percentages of current ages in the total sample | 32 |
| 3. Percentages of people in the total sample in each of the occupation sectors | 33 |
| 4. Marital status in the total sample | 34 |
| 5. Composition in percentages of the marital status in the vestibular hyposensitive sample with the remaining group | 35 |
| 6. Mother's age at delivery for the total sample | 36 |
| 7. Percentage of people in the total sample abusing the particular drug classes | 39 |
| 8. Percentage of people from the total sample in the allocated ages of onset (in years) of substance abuse | 40 |
| 9. Percentage of people in the total sample abusing substances for the allocated durations (in years) | 41 |
| 10. The composition in percentages of people in the total sample presenting with the three types of sensitivity and their substance of abuse | 42 |
| 11. Comparison between the percentage of people with vestibular hyper- and hyposensitivity, with respect to the specific drug classes | 43 |
| 12. Comparison of the vestibular hyposensitive people with the remaining group, with respect to the specific drug classes | 44 |
| 13. Comparison of the vestibular hypersensitive group with the remaining group, with respect to the specific drug classes | 45 |
| 14. Total sample analysis of the subjective reasons for abusing substances | 45 |