This research was conducted for the purpose of determining the "concreteness" that is required for a persuasive one-minute speech with "problem-solution" structure. From the comparative analyses between 22 concrete speeches and 26 non-concrete speeches, the following factors are identified as the keys to determine the "concreteness" of problem-solution speeches: 1) citing statistical data to show the present situations of the problem; 2) giving concrete examples and indicating the cause-effect relationship to explain the causes of the problem; 3) giving concrete examples to explain the measures for the problem.
