Which scientific technique is NOT commonly used in retail sentiment analysis systems to process customer feedback?

Modern retailers use sophisticated sentiment analysis algorithms to understand customer emotions and preferences. These scientific approaches transform raw feedback into actionable insights. This poll tests your knowledge about how retailers are applying scientific sentiment analysis techniques to improve customer experiences and drive business decisions. Do you understand how science and retail are converging in this fascinating field?

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Natural Language Processing (NLP) with transformer models
Facial expression recognition via computer vision
Quantum sentiment entanglement analysis
Voice tone analysis using acoustic feature extraction