Hypnotism originated from the name of Hypnos, the god of sleep in Greek mythology, and it is a technique to communicate with subjects' subconscious by psychological suggestion. Because the function of people's subconscious mind to doubt and contradict foreign information will be weakened, the performer will replace the original negative information (also called experience, such as anxiety, fear and depression) with some positive hypnotic hints (also called information, such as confidence, courage and dignity).

Psychology is a science that studies human psychological phenomena, psychological functions and behaviors. It is not only a theoretical discipline, but also an applied discipline. Including basic psychology and applied psychology.

Psychological research involves many fields such as perception, cognition, emotion, personality, behavior, interpersonal relationship and social relationship, as well as many fields of daily life-family, education, health and society. On the one hand, psychology tries to explain the basic behavior and psychological function of individuals with brain operation, and at the same time, psychology also tries to explain the role of individual psychological function in social behavior and social motivation; At the same time, it is also related to neuroscience, medicine, biology and other sciences, because the physiological functions discussed in these sciences will affect the mind of individuals.

Psychologists engage in basic research to describe, explain, predict and influence behavior. Applied psychologists also have a fifth purpose-to improve the quality of human life. These goals form the basis of psychology.

Meaning of psychological symbols: Symbol means soul in Greek, and later became English psyche.