مقایسهٔ روش‌ها

	Media System Dependency Analysis	Spiral of Silence Survey
حوزه	Communication	Communication
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	1976	1974
پدیدآور	Sandra Ball-Rokeach & Melvin DeFleur	Elisabeth Noelle-Neumann
نوع	Survey approach to audience reliance on media to meet goals	Survey approach to opinion expression under perceived social pressure
منبع بنیادین	Ball-Rokeach, S. J., & DeFleur, M. L. (1976). A dependency model of mass-media effects. Communication Research, 3(1), 3–21.	Noelle-Neumann, E. (1974). The spiral of silence: A theory of public opinion. Journal of Communication, 24(2), 43–51.
نام‌های دیگر	Media dependency analysis, MSD analysis, Dependency theory measurement, Medya Bağımlılığı Analizi	Spiral of silence measurement, Willingness to self-censor survey, Opinion climate survey, Suskunluk Sarmalı Anketi
مرتبط	4	4
خلاصه	Media system dependency analysis operationalizes Ball-Rokeach and DeFleur's 1976 theory that media effects are strongest when individuals depend heavily on the media system to attain personal goals — understanding their world, orienting their actions, and finding diversion. The method surveys the intensity of these dependency relations and relates them to cognitive, affective, and behavioral effects of media.	The spiral of silence survey operationalizes Elisabeth Noelle-Neumann's 1974 theory that people who perceive their opinion to be in the minority grow reluctant to express it for fear of social isolation, which makes the apparent majority seem ever stronger — a self-reinforcing spiral. The method measures individuals' own opinions, their perception of the opinion climate, their fear of isolation, and their willingness to speak out, then models how these combine.