Concept
hypodermic needle (magic bullet) model
The textbook story that mass media deliver messages directly and uniformly to a passive, isolated audience, like an injection or a bullet that hits its target; according to historians, a label added later.
The hypodermic needle or magic bullet model is presented in textbooks as the first “effects” view of mass communication: a powerful medium sends its message straight into an isolated, passive crowd; the effect is fast and similar in everyone. In Turkish sources the same idea appears under the names “hipodermik iğne”, “sihirli mermi”, “uyarıcı–tepki” (stimulus–response) and “propaganda modeli”; Yaylagül explains it with the image of a syringe injecting under the skin or a magic bullet (Yaylagül 2006).
The historical record is different. The 1927 book that is often credited with the model does not contain these phrases. The phrase “hypodermic needle” is documented in Berlo in 1960, attributed to nobody and used as the opposite of a “process” view; the name “Bullet Theory” is claimed by Schramm in 1971 as his own coinage. Historians such as Sproule (1989) and Lubken (2008) argue that the picture is a straw man, that is, a rival distorted so that it is easy to refute, which does an injustice to interwar propaganda critics and to the science of the time.
This does not mean that there was no worry about powerful effects in the 1920s and 1930s; for that worry see powerful effects assumption.
Example
(Hypothetical example.) On an exam paper the sentence “According to the hypodermic model, an advertising message affects the audience immediately and in the same way in everyone” summarizes the textbook version; the historical version adds “no single theory under this name was defended; the label was attached later”.