Our brains favor things that are easy to think about ('processing fluency'), subconsciously misattributing this ease as a positive feeling toward the product itself. Subtle cues like font matter immensely; a slim font for a 'slim' phone can increase purchase intent by 27% simply because the visual aligns with the message.

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Consumers perceive products as higher quality when they are aware of the effort (e.g., number of prototypes, design iterations) that went into creating them. This 'labor illusion' works because people use effort as a mental shortcut to judge quality. Dyson's '5,127 prototypes' is a classic example.

Humans naturally conserve mental energy, a concept Princeton's Susan Fisk calls being 'cognitive misers.' For most decisions, people default to quick, intuitive rules of thumb (heuristics) rather than deep, logical analysis. Marketing is more effective when it works with this human nature, not against it.

Human vision has two modes: sharp central focus (foveal) for details like text, and wide peripheral vision that scans for general signals like shape, color, and movement. Since peripheral vision detects things first but cannot read, visual marketing must grab attention with imagery before communicating details with text.

Donald Miller argues that purchases are driven by words that are easy to understand, not by brand aesthetics. Making a customer think is a barrier to a sale. Simplifying your message to reduce mental effort is more effective than having a beautiful website or logo, as exemplified by Amazon's success.

In a study, a faint chocolate smell was pumped into a store. While none of the 105 shoppers interviewed afterward consciously noticed the scent, the featured chocolate brand's share jumped by 41%. This demonstrates that subconscious sensory cues can bypass rational thought and directly influence purchasing decisions.

Our brains remember tangible information we can visualize four times better than abstract ideas like 'quality' or 'trust.' Instead of describing MP3 player storage in 'megabytes,' Apple used the concrete, visual phrase '1,000 songs in your pocket,' making the benefit sticky and easy to recall.

Abstract technical specs like "5 gigabytes of storage" are far less memorable than concrete phrases that create a mental image. Research shows people are four times more likely to recall concrete terms (like "white horse") than abstract ones. Effective taglines allow the customer to visualize the benefit.

The way a price is presented alters a consumer's emotional response, even if the total cost is identical. Breaking a large sum into smaller installments, like Klarna does, makes it feel more manageable and less intimidating, thus boosting sales.

Extensive behavioral research on ad performance reveals a clear pattern: simplicity is superior. Creatives with multiple storylines, clutter, and excessive detail create cognitive load and reduce effectiveness. The best-performing ads feature a single, clear message that is easy for the human brain to process quickly.

Human decision-making is not rational. The brain processes emotional cues, like images, thousands of times faster and finds them vastly more persuasive than logical arguments. Effective brand appeal must lead with emotion, as consumers feel first and then use reason to justify their initial impulse.