Therefore, the mixed design method

Therefore, the mixed design method is used in the design process of the questionnaire, and the time limit and limit are used as the design between groups, discount strength, time limit strength and limit strength as the design within the group, that is, each subject only needs to choose one of the two scenarios of limited time sales and limited sales, and each subject only needs to answer the situation of four scenarios with a certain indicator under the condition of limited time or limit. It can effectively reduce the fatigue degree of the subjects in the process of answering papers, and then reduce the data deviation. The specific experimental design is shown in figure 4 / 1.