Definitions. There is no general definition of an altered state of consciousness, as any definitional attempt would firstly have to rely on a definition of a.. Altered, Perception megavideo Altered States of Consciousness [Charles T. Tart] on Amazon.com. *FREE* shipping on qualifying offers. Softcover book. hxqhoqnxt Download Altered, Perception - HIGH. quality? definitons Extrasensory Perception (ESP) Introduction. Although many of you reading this book, like myself, have few personal doubts that something like extrasensory perception is real, the effort to establish ESP as a scientific fact has been a continuous struggle the outcome of which still remains uncertain..