Which scientific technology first allowed retailers to accurately measure unconscious consumer responses to products and store environments?

The intersection of science and retail has created revolutionary changes in how consumers shop and how retailers understand behavior. From eye-tracking technology that maps customer journeys through stores to biometric feedback measuring emotional responses to products, scientific approaches are transforming retail strategy. This trivia question explores a groundbreaking scientific advancement that dramatically changed how retailers understand consumer psychology and decision-making processes.

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Functional Magnetic Resonance Imaging (fMRI)
Electroencephalography (EEG) Caps
Galvanic Skin Response (GSR) Sensors
Pupillary Response Tracking