Development of Psychophysical Methods for Estimating Human Odour Detection Thresholds

.......................................................................................................................................................... III DEDICATION ........................................................................................................................................................ IV ACKNOWLEDGEMENTS ......................................................................................................................................... V TABLE OF CONTENTS ......................................................................................................................................... VII LIST OF FIGURES ................................................................................................................................................. IX LIST OF TABLES ................................................................................................................................................. XIII CHAPTER I – GENERAL INTRODUCTION ............................................................................................................. 1 1.1 Psychophysics ............................................................................................................................................ 2 1.2 Theories about Sensory Thresholds ........................................................................................................... 8 1.3 Odour Detection Thresholds ..................................................................................................................... 26 1.4 Investigation of Psychophysical Methods for Odour Threshold Measurement ....................................... 34 1.5 Review of Current Methods for Estimating Odour Thresholds ............................................................... 38 1.6 Objectives of this Thesis .......................................................................................................................... 48 CHAPTER II – THE EFFECT OF STOPPING RULES ON THRESHOLDS ESTIMATED WITH ASTM E679 ....... 53 2.

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