Psychology is a fascinating field of study that reveals many intriguing facts about human behavior and the mind. Here are some psychological facts that many people may not know:

1. The Power of Music: Listening to music can have a powerful effect on the brain and can help to improve mood, reduce stress, and promote relaxation. Studies have shown that listening to music can increase the production of dopamine, a neurotransmitter that is associated with pleasure and reward.
2. The Primacy Effect: The primacy effect is a psychological phenomenon that refers to the tendency for people to remember information that they learned first more easily than information that they learned later. This can be seen in a variety of contexts, from remembering the names of people at a party to recalling information from a lecture.
3. The Placebo Effect: The placebo effect is a phenomenon in which a person experiences a positive effect after receiving a treatment that is not actually active. This can occur in a variety of situations, such as when a person takes a sugar pill that they believe is a real medication.
4. The Halo Effect: The halo effect is a cognitive bias that causes people to perceive individuals who possess one positive trait as having many positive traits. For example, a person who is physically attractive may be perceived as being intelligent and kind, even if there is no evidence to support these perceptions.
5. The Baader-Meinhof Phenomenon: The Baader-Meinhof Phenomenon is a phenomenon in which a person becomes aware of something and then begins to see it everywhere. This can occur with words, ideas, or objects, and is thought to be related to the brain's selective attention.
6. The Bystander Effect: The bystander effect is a social phenomenon in which individuals are less likely to intervene in an emergency situation when others are present. This is thought to be due to diffusion of responsibility, in which individuals assume that someone else will take action.
7. The Illusion of Control: The illusion of control is a cognitive bias that causes people to overestimate their ability to control events. This can be seen in situations such as gambling, where people may believe that they have a greater ability to control the outcome than they actually do.

In conclusion, psychology is a field that offers many fascinating insights into human behavior and the mind. These are just a few of the many psychological facts that people may not be aware of, and there is much more to discover about the complex workings of the human psyche.