Kids pick up the ability to detect sarcasm at a young age. Pexman and her colleagues in Calgary showed children short puppet shows in which one of the puppets made either a literal or a sarcastic statement. The children were asked to put a toy duck in a box if they thought the puppet was being nice. If they thought the puppet was being mean, they were supposed to put a toy shark in a box. Children as young as 5 were able to detect sarcastic statements quickly.
Pexman said she has encountered children as young as 4 who say, “smooth move, mom” at a parent’s mistake. And she says parents who report being sarcastic themselves have kids who are better at understanding sarcasm.
There appear to be regional variations in sarcasm. A study that compared college students from upstate New York with students from near Memphis, Tennessee, found that the Northerners were more likely to suggest sarcastic jibes when asked to fill in the dialogue in a hypothetical conversation.
Northerners also were more likely to think sarcasm was funny: 56 percent of Northerners found sarcasm humorous while only 35 percent of Southerners did. The New Yorkers and male students from either location were more likely to describe themselves as sarcastic.
There isn’t just one way to be sarcastic or a single sarcastic tone of voice. In his book, Haiman lists more than two dozen ways that a speaker or a writer can indicate sarcasm with pitch, tone, volume, pauses, duration and punctuation. For example: “Excuse me” is sincere. “Excuuuuuse me” is sarcastic, meaning, “I’m not sorry.”
According to Haiman, a sarcastic version of “thank you” comes out as a nasal “thank yewww” because speaking the words in a derisive snort wrinkles up your nose into an expression of disgust. That creates a primitive signal of insincerity, Haiman says. The message: These words taste bad in my mouth and I don’t mean them.
In an experiment by Patricia Rockwell, a sarcasm expert at the University of Louisiana at Lafayette, observers watched the facial expressions of people making sarcastic statements. Expressions around the mouth, as opposed to the eyes or eyebrows, were most often cited as a clue to a sarcastic statement.
The eyes may also be a giveaway. Researchers from California Polytechnic University found that test subjects who were asked to make sarcastic statements were less likely to look the listener in the eye. The researchers suggest that lack of eye contact is a signal to the listener: “This statement is a lie.”
Another experiment that analyzed sarcasm in American TV sitcoms asserted that there’s a “blank face” version of sarcasm delivery.
Despite all these clues, detecting sarcasm can be difficult. There are a lot of things that can cause our sarcasm detectors to break down, scientists are finding. Conditions including autism, closed head injuries, brain lesions and schizophrenia can interfere with the ability to perceive sarcasm.
Researchers at the University of California at San Francisco, for example, recently found that people with frontotemporal dementia have difficulty detecting sarcasm. Neuropsychologist Katherine Rankin has suggested that a loss of the ability to pick up on sarcasm could be used as an early warning sign to help diagnose the disease. “If someone who has the sensitivity loses it, that’s a bad sign,” Rankin says. “If you suddenly think Stephen Colbert is truly right wing, that’s when I would worry.”
Many parts of the brain are involved in processing sarcasm, according to recent brain imaging studies. Rankin has found that the temporal lobes and the parahippocampus are involved in picking up the sarcastic tone of voice. While the left hemisphere of the brain seems to be responsible for interpreting literal statements, the right hemisphere and both frontal lobes seem to be involved in figuring out when the literal statement is intended to mean exactly the opposite, according to a study by researchers at the University of Haifa.