1. Studies Show Store Design Really Affects Buying Behavior Research on retail psychology finds that a shop’s layout, display design, and atmosphere strongly influence what customers do. In one study, when stores optimized space, layout, lighting and display, shoppers stayed longer, browsed more, and were more likely to buy — which increased sales and overall store profitability. · When a store is too crowded or cluttered, shoppers tend to leave earlier or avoid exploring. ·