Why Do We Smile

The video explores smiling as a form of communication, highlighting its role in social interactions. It delves into the evolutionary background of smiling, comparing human smiles to primate teeth expressions. Studies show that smiling influences trust and cooperation, indicating that smiles are more about social bonding than mere happiness. The evolution of smiling from a threat display to a friendly gesture is discussed, emphasizing its significance in human and primate interactions.

Why is it unusual for humans to show their teeth when smiling?

• Teeth are not visible in other expressions.

• Teeth are associated with aggression in many mammals.

• Teeth are primarily used for eating.

• Teeth are difficult to maintain.

What is the purpose of the 'silent bared teeth' expression in rhesus macaques?

• To express happiness.

• To attract a mate.

• To signal submission.

• To show dominance.

How do chimpanzees use the 'silent bared teeth' expression?

• To find food.

• To intimidate rivals.

• To establish territory.

• To enhance social bonding.

In the 2001 study, what factor increased the likelihood of trust between participants?

• The age of the participants.

• The duration of the game.

• The amount of money involved.

• The presence of a smiling face.

What did the 2007 study reveal about the relationship between smiling and sharing?

• Smiling is directly linked to happiness.

• People smile less when sharing.

• Smiling is a signal of cooperation.

• Sharing decreases the frequency of smiling.