What is the 'Gruen Transfer' effect in retail store design?

Store layouts are carefully engineered to influence shopper behavior and maximize sales. From the placement of essential items to the width of aisles and the strategic positioning of high-margin products, every element serves a purpose. This trivia question explores one of the fascinating psychological techniques used by retailers to guide customer movement through their stores.

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The moment when customers, disoriented by a store's layout, forget their original shopping intentions and become more susceptible to impulse purchases
The technique of placing essential items at the back of the store to force customers to walk through other departments
The practice of using mirrors to make retail spaces appear larger and more inviting to shoppers
The strategic use of lighting to highlight premium products while keeping budget items in dimmer areas