This book presents an approach to quantifying consciousness and its various states. It represents over ten years of work in developing, test ing, and researching the use of relatively simple self-report question naires in the retrospective assessment of subjective or phenomenologi cal experience. While the simplicity of the method allows for subjective experience to be reliably and validly assessed across various short stim ulus conditions, the flexibility of the approach allows the cognitive psy chologist, consciousness researcher, and mental health professional to quantify and statistically...