(The theoretical core of transpersonal psychology research is the theory of consciousness, but it is different from the traditional Western theory of consciousness, but a layered theory of consciousness including consciousness and subconsciousness, with high and low levels. In a nutshell, human consciousness can be divided into normal consciousness and abnormal consciousness. The former is a low-level, differentiated state of consciousness, while the latter is a high-level, transcendent state of consciousness. Tarter defined it as "individuals clearly feel that their mental function patterns have undergone qualitative changes, that is, mental activities not only feel quantitative changes, but also qualitative differences." Kripner specifically divides 20 different states of consciousness, of which the first 19 are transformed states of consciousness and the last is normal waking consciousness.)