# The Persuasion File

> The psychology behind why people spend


## Posts

- [Free Shipping Thresholds: Why You Spend $12 to Save $6](https://thepersuasionfile.com/free-shipping-threshold-psychology/): Why does a $6 shipping fee feel like a scam, but $12 of extra stuff feels like a win?
- [Left-Digit: The Explanation You Needed](https://thepersuasionfile.com/left-digit-effect/): Why does the $9.99 choice feel so much better than the $4.99 option?

## Pages

- [Checkout Psychology](https://thepersuasionfile.com/checkout-psychology/): A price is never just a number. It’s a signal, and the brain reads it in milliseconds, before logic gets a say. Shoppers don’t evaluate prices.
- [Pricing Psychology](https://thepersuasionfile.com/pricing-psychology/): A price is never just a number. It’s a signal, and the brain reads it in milliseconds, before logic gets a say. Shoppers don’t evaluate prices.
- [Home](https://thepersuasionfile.com/): From charm pricing to dark patterns recognized in checkouts - this is where marketers go to understand the psychology their industry runs on.
- [Contact](https://thepersuasionfile.com/contact/): Do you have a tactic worth breaking down? A Correction? A Question? Or... just want to talk shop? Please don't hesitate to reach out!
- [About](https://thepersuasionfile.com/about/): Every purchase you make was decided before you ever made it.
- [Privacy Policy](https://thepersuasionfile.com/privacy-policy/): Our website address is: http://thepersuasionfile.com.

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- [Agent (MCP protocol)](websites-agents.hostinger.com/thepersuasionfile.com/mcp)

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