What psychological facts you should know?

 1. **Confirmation Bias:** People tend to seek information that confirms their existing beliefs, leading to a biased interpretation of events.

2. **Cognitive Dissonance:** The discomfort felt when holding conflicting beliefs, often resolved by adjusting one's attitudes to align with their actions.

3. **Halo Effect:** Our overall impression of a person influences how we feel and think about their character, leading to biased judgments.

4. **Placebo Effect:** Believing a treatment is effective can sometimes produce real therapeutic effects, even if the treatment itself is inert.

5. **Dunning-Kruger Effect:** Individuals with low ability at a task may overestimate their ability, while those with high ability may underestimate their competence.

6. **Mere Exposure Effect:** Repeated exposure to a stimulus increases our preference for it, demonstrating the influence of familiarity on liking.

7. **Social Identity Theory:** People categorize themselves and others into social groups, leading to in-group favoritism and out-group bias.

8. **Pygmalion Effect:** Higher expectations lead to an increase in performance, demonstrating the impact of beliefs on outcomes.

9. **Bystander Effect:** The presence of others can reduce the likelihood of an individual helping someone in need, assuming others will take responsibility.

10. **Recency Effect:** The tendency to remember the most recent information better than earlier information in a sequence.

Understanding these psychological phenomena can provide insights into human behavior and improve interpersonal interactions.