Mental Accounting
Also called: mental accounts, money buckets
Mental accounting is treating money differently depending on where it came from or what it's labelled for, even though money is fungible. It's why people carry 19% credit card debt while holding a 0.5% savings account, and why a tax refund gets spent more freely than salary. It can be used deliberately: sinking funds and separate savings accounts exploit the same instinct in a useful direction.
Where this is taught
Definitions are the trailer. These free levels turn Mental Accounting into something you play — one bite-size lesson, with worked examples, a quiz and XP.