Roland Barthes(1977) 用這個詞彙來說明：觀眾解讀圖像意義時，會受到圖說文字影響的現象。

圖片或照片屬於意義開放的文本，文字則用來引導觀眾對圖像進行特定的解讀(preferred reading)。即，「詞語錨定了所指的浮動鍊條」

All images are polysemous: they imply a “floating chain” of signifieds. Every society develops techniques to fix the floating chain of signifieds in such a way as to counter the terror of uncertain signs. The linguistic message serves as one of these techniques (Barthes, 1977:38-39).

References

• Barthes, R. (1977). Image-Music-Text (S. Heath, Trans.). London: Harper Collins.

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