1. observation method is a research method to observe and record the behavior of the studied object purposefully and systematically. Observation is the most widely used research method in scientific research. Scientific observation methods must first solve three problems: what to observe, how to observe and how to record. Observation can be divided into natural observation and laboratory observation, and it is often necessary to record the psychology and behavior of the researcher with the help of instruments and equipment. According to different observation requirements, observation methods can be divided into long-term observation and regular observation.

2. Experimental methods Experimental methods are research methods that purposefully control certain conditions or situations to arouse certain psychological reactions of subjects. The experimental method can not only explain "what", but also further explain "why".

3. Measurement refers to the method of measuring a certain psychological quality of people with standardized scales (questionnaires). Common psychological measures include intelligence test, personality test, achievement test, attitude test and creativity test.