Studying the main idea and tone of speech using an algorithm is of theoretical and methodological significance for determining the phenomena and their meaning structure in discourse studies. We numerically and indexically ranked the frequency and strength of relevance of themes to create a structure map of the discourse's meaning, In doing so, we intended to determine the main ideas of speech and speech by keywords and to determine the spread and impact of those keywords using an algorithm-based method.

Keywords : Macrostructure, mental models, semantic structure, keyword distribution, topic modeling, mathematical-statistical methods.