What are some psychological facts that people don't know?

Sure, here are some lesser-known psychological facts:

1. The Baader-Meinhof Phenomenon: Also known as frequency illusion, this phenomenon occurs when you learn about something new and start noticing it everywhere. It's like when you buy a new car and suddenly see the same model everywhere.

2. The Dunning-Kruger Effect: This is a cognitive bias where people with low ability at a task overestimate their ability. Essentially, they don't know enough to know how unskilled they are.

3. The Zeigarnik Effect: This psychological phenomenon suggests that people remember uncompleted or interrupted tasks better than completed tasks. It's why unfinished tasks tend to nag at us until we finish them.

4. The Spotlight Effect: This is the tendency to overestimate how much others notice or remember about our appearance or behavior. We often feel like we're under a spotlight, when in reality, people are usually more focused on themselves.

5. The Paradox of Choice: More options don't necessarily lead to greater satisfaction. In fact, having too many choices can lead to anxiety, decision paralysis, and ultimately, less satisfaction with the chosen option.

6. The Illusion of Transparency: People tend to overestimate the extent to which their internal thoughts and feelings are apparent to others. In reality, others often have much less insight into our internal states than we think.

7. The Halo Effect: This is the tendency for an impression created in one area to influence opinion in another area. For example, if someone is physically attractive, we may also assume they are intelligent or kind, even without evidence.

8. The Bystander Effect: The presence of others can inhibit individual action during an emergency. The more people present, the less likely any one of them is to help, as responsibility becomes diffused among the group.

9. The Primacy and Recency Effect: When trying to remember a list of items, people tend to remember the first few (primacy effect) and last few (recency effect) items best, with items in the middle being remembered less accurately.

10. The Anchoring Effect: This is the tendency to rely too heavily on the first piece of information encountered when making decisions. Subsequent information is often interpreted based on this initial anchor.

These are just a few examples of fascinating psychological phenomena that can help us understand human behavior better.