Which innovative retail design technique is used by grocery stores to increase sales by deliberately making customers walk through more of the store?

Modern food retailers use sophisticated psychological principles to influence purchasing behavior. From the placement of essential items to the strategic use of colors and scents, grocery stores are carefully designed laboratories of consumer psychology. This trivia question explores one of the innovative techniques used to maximize sales in the modern food retail environment.

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The Gruen Transfer - using mirrors and bright lighting to disorient shoppers
The IKEA Effect - forcing customers to assemble parts of their shopping experience
The Boomerang Layout - placing essential items like milk and bread at the back of the store
The Mozart Effect - playing classical music that subconsciously extends shopping time