1 . Researchers concluded that the first laughter appears at age 3 ½ - 4 months , ie long before knowing how to talk. Like crying , laughter is a preverbal form of interaction between child and parent or caregiver 's .
2. At the age of 5 and 6 years is observed most exuberant laughter . Spelling or grammar mistakes , small errors of logic or chasing around the house can cause episodes of laughter that the same events will not generate pre- adolescents and adolescents.
3 . Childbearing uncertainty , adolescents are more likely to laugh at jokes labeled aggressive or sexual notes or refer to authority figures . Some psychologists consider this type of event as an attempt to gain and maintain control . For example, a teenager who , in the midst of a group of friends , laugh at a joke about abortion can try to mask the secondment , to others or to himself , lack of resolute position regarding this issue.
4 . The average adult laughs 17 times a day, or about six minutes a day . Instead , a child laugh 300 to 400 times per day.
5 . People laugh when they feel safe , they feel comfortable in the presence of another, when they are open and free to express . Therefore , anthropologist Mahadev Apte highlights the role of social connection that laughter plays in human relationships . He says that laughter is contagious because it appeared in a social bonds tends to solidify that connection .
6. Laughter can be a tool that ensures that individuals are not excluded from a social group. This theory is supported by results of studies showing that individuals with a dominant social position ( boss, head of the family , group leader) use more humor than subordinate individuals .
7. Robert Provine said that we use laughter to change the behavior of others . For example, in a situation where we feel uncomfortable or threatened, laughter can serve as a gesture of conciliation or as a way to combat the wrath of the other. If the person to feel threatened us laugh with us , the risk of a confrontation between us and that person decreases.
8. Some scientists believe that laughing caused by tickling is an innate reflex . If this is true , in theory we should be able to tickle yourself. However, we can not, even if we tickle the same place and in the same way that we would cause laughter if we would tickle anyone . Although the information transmitted to the brain is the same in both cases , it seems that tickling does not occur only when the brain is in tension or surprised , states missing when a man tickles one . How the human brain uses this information about tension and surprise is still a mystery to scientists.
9. Contrary psychologists say that laughter is a learned behavior , Steve Wilson, American psychologist known for promoting laughter therapy , believes that man knows how to laugh since he was born . He brings as an argument the observation that people born blind or deaf laugh and laugh children shortly after birth.
10 . Though most of us believe that the ultimate purpose of laughter is to let others know that you think something funny , according to one article in the Quarterly Review of Biology, it is likely that the primary function of laughter is not self-expression . Instead , the purpose of laughter would be to arouse positive feelings in others .
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