The results of the interrogative psycholinguistic experiment described in this article is part of a broader research of how soci-ocultural knowledge influences communication in the Internet discussions by readers of American press. The experiment allows obtaining a complex model of positively/negatively evaluated events in the American society, paying special attention to the value-evaluation component. This model can further be a basis for explanation of the communicative strategies of argumentation and manipulation used in verbal description of events. The type of sociocultural mental structures described in the article is viewed as a dynamic cognitive gestalt that can be potentially split into a number of parameters, but is not reducible to their sum, which is characterized by both individual existence in the mind of a native speaker and distributed existence in a sociocultural community as an abstract social invariant. The article discusses advantages of psycholinguistic approach to modeling the fragments of this background knowledge compared to using exclusively introspective text analysis, as it allows to separate methodologically the research of mental structures and particular instances of verbal communication that are based on those structures and gives an opportunity to avoid the vicious circle of studying communicative strategies used in the text exclusively modeled from the same text material.