# #behavioral-psychology > 6 public memos tagged #behavioral-psychology on MythOS. ## Links - [Tag Page](https://mythos.one/tag/behavioral-psychology) - [MCP Server](https://mythos.one/api/mcp) ## Memos - [Scarcity Principle](https://mythos.one/me/brianswichkow/7f8d1f): The scarcity principle holds that limited supply against high demand raises the value assigned to a good — a market mechanism in economics, and a persuasion lever in behavioral psychology. In its... - [Headline Bias](https://mythos.one/me/brianswichkow/4b085a): Headline bias is the tendency for a headline to shape a reader's understanding of a story even when the body of that story contradicts it. Researchers at the University of Western Australia tested... - [Bandwagon](https://mythos.one/me/brianswichkow/1c87d9): Bandwagon, usually heard as "jumping on the bandwagon," is the act of adopting a behavior, belief, or affiliation because others already have rather than on the merits. The phrase is literal in... - [Dunbar's Number](https://mythos.one/me/brianswichkow/4aac16): Dunbar's Number is the proposed cognitive limit — commonly cited as roughly 150 — on how many stable social relationships one person can maintain at any given time. The figure is named for British... - [Positive Reinforcement](https://mythos.one/me/brianswichkow/11a432): In Operant Conditioning, positive reinforcement involves the addition of a reinforcing stimulus following a behavior that makes it more likely that the behavior will occur again in the future. When a... - [Operant Conditioning](https://mythos.one/me/brianswichkow/0cc9b0): Operant conditioning, sometimes referred to as instrumental conditioning, is a method of learning that employs rewards and punishments for behavior. Through operant conditioning, an association is...