A fascinating article by Gina Mireault, a professor of psychology at Johnson State College in Vermont about laughter in infancy.
Did you know that babies who are deaf or blind laugh and smile at the same milestones as their peers? Amazing isn’t it?
Here is an excerpt from the article but please take the time to read the whole thing – it’s well worth it. The link to the full article is below the excerpt.
Before they speak or crawl or walk or achieve many of the other amazing developmental milestones in the first year of life, babies laugh. This simple act makes its debut around the fourth month of life, ushering in a host of social and cognitive opportunities for the infant. Yet despite the universality of this humble response and its remarkable early appearance, infant laughter has not been taken seriously. At least, not until recently. In the past decade, researchers have started to examine what infant laughter can reveal about the youngest minds, whether infants truly understand funniness, and if so, how.
Prompted by observations of infant laughter made by none other than Charles Darwin himself, modern psychologists have begun to ask whether infant laughter has a purpose or can reveal something about infants’ understanding of the world. Darwin speculated that laughter, like other universal emotional expressions, serves an important communicative function, which explains why nature preserved and prioritised it. Two key pieces of evidence support Darwin’s hunch. First, according to the psychologist Jaak Panksepp of Bowling Green State University in Ohio, laughter is not uniquely human. Its acoustic, rhythmic, and facial precursors appear in other mammals, particularly in juveniles while they are at play, pointing to the role of evolution in human laughter.
Second, the pleasure of laughter is neurologically based. It activates the dopamine (‘reward’) centre of the brain. Laughing – in many ways – has the same effect on social partners as playing. While the pleasure of playing is a way for juveniles to bond with each other, the pleasure of laughing is a way for adults to do so, as across mammalian species, adults rarely ‘play’. Shared laughter is as effective as playing in finding others to be a source of joy and satisfaction. Thus laughter biologically reinforces sociability, ensuring the togetherness needed for survival.