Which linguistic analysis technology first allowed digital marketers to automatically detect and categorize consumer emotions in social media posts at scale?

In the world of language and linguistics, digital marketing has evolved to incorporate sophisticated language analysis techniques. From sentiment analysis to natural language processing, the way brands communicate with consumers has transformed dramatically. This poll tests your knowledge about a significant linguistic innovation in digital marketing that revolutionized how companies understand consumer language patterns.

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Semantic differential scaling (1970s)
Sentiment analysis using natural language processing (2000s)
Contextual grammar checking (1990s)
Phonetic pattern recognition (1980s)