PsychologyEmotions
The muscle that crinkles the corners of your eyes in a genuine smile is largely outside voluntary control.
Most people cannot fire it on demand, which is why posed smiles look posed.
Source
This fact is written from the English Wikipedia article it links to, so you can check every word in one tap. Fact Drop rates that source 4 out of 5 for credibility, and the rating travels with the fact on the back of its card in the app.
More psychology facts
Psychology facts about the mind that is reading this. Every time you recall a memory you rewrite it, researchers planted a fake childhood memory in one person in four, and placebos keep working after you are told they are placebos. Each one links to the reference behind it.
- Rejection runs on your pain circuitry.
- Forcing a smile genuinely lifts your mood a little.
- Researchers implanted a fake childhood memory in 1 in 4.
- The colour of a pill changes how well it works.
- Your brain can be convinced a rubber hand is yours.
- In a classic experiment, a stranger asking for directions was swapped for a different person mid-conversation while two workers carried a door between them.