What are some of the most awesome psychological facts?

1. The mere-exposure effect, states that people tend to develop a preference for things just because they are familiar with them.

2. The Baader- Meinhof phenomenon, also known as frequency illusion, is where a newly learned word or idea seems to appear everywhere.

3. The Dunning-Kruger effect is a cognitive bias in which people with low ability at a task overestimate their ability.

4. The halo effect is when people form an overall impression of a person based on one characteristic.

5. A self-fulfilling prophecy is when a belief or expectation leads to behavior that makes the belief come true.

6. The bystander effect, which is then on where the greater the number of people present, the less likely people are to help someone in distress.

7. The sunk cost fallacy, which is when people continue to invest in something because they have already invested a lot of time or resources, even when it is not rational to do so.