The blog of Xeno, a slightly mad scientist
Be it triumph or crushing defeat, exhilaration or agony, body language more accurately conveys intense emotions, according to recent research that challenges the predominance of facial expressions as an indicator of how a person feels.
Princeton University researchers report in the journal Science that facial expressions can be ambiguous and subjective when viewed independently. The researchers asked study participants to determine from photographs if people were experiencing feelings such as loss, victory or pain from facial expressions or body language alone, or from both. In some cases, a facial expression associated with one emotion was paired with a body experiencing the opposite emotion.
In four separate experiments, participants more accurately guessed the pictured emotion based on body language — alone or combined with facial expressions — than on facial context alone. Senior researcher and Princeton Professor of Psychology Alexander Todorov said that these results challenge the clinical — and conventional — presumption that the face best communicates feeling. Indeed, despite the findings, a majority of the study’s participants sided with the face when asked how they gauge feelings, a misconception the researchers referred to as “illusory facial affect.”
“We find that extremely positive and extremely negative emotions are maximally indistinctive,” said Todorov, who worked with first author Hillel Aviezer, a psychology professor at Hebrew University of Jerusalem who conducted the work as a postdoctoral researcher under Todorov, and Yaacov Trope, a psychology professor at New York University.
“People can’t tell the difference, although they think they can,” Todorov said. “Subjectively people think they can tell the difference, but objectively they are totally at [random] chance of determining correctly. The message of this research is that there is a lot of information in body language people aren’t necessarily aware of.”
The paper in Science counters popular theories holding that facial expressions are universally consistent indicators of emotion. The most prominent, Todorov said, have been developed by psychologist and University of California-San Francisco professor emeritus Paul Ekman, whose work was fictionalized in the television series “Lie to Me.”
Instead, facial movements may be “much blurrier” than those theories account for, Todorov said. In particular, he and his colleagues suggest that when emotions reach a certain intensity, the intricacies of facial expressions become lost, similar to “increasing the volume on stereo speakers to the point that it becomes completely distorted,” he said. …
For their study, the Princeton researchers used stock photos of people at six emotional “peaks”: pain, pleasure, victory, defeat, grief and joy. In the first experiment, three groups of 15 people were shown only the facial expression, the body position or the face and body together, respectively. Participants who saw the face only had a 50-50 chance of being correct, whereas those who only saw a body or the face and body together were far more accurate.
Yet, these respondents also exhibited a high degree of illusory facial affect: 53 percent of people who saw the body-and-face photos said they relied on the face. Of a group for whom the pictures were described but not shown, 80 percent said they would rely solely on the face when determining the emotion pictured, while 20 percent they would look to the face and the body together. No one indicated they would judge by body language alone.
In the second experiment, photos were manipulated so that faces from one emotional peak such as victory were spliced onto a body from an opposing peak such as defeat. In those cases, participants more often determined the emotion to be that associated with the body.
For the third experiment, participants rated a variety of faces that fell with in the six emotional categories with ambiguous results. In fact, the authors report, respondents interpreted the positive faces as negative more than they did the negative faces. Those faces were then randomly put upon bodies in a situation of victory or pain, and victory or defeat. Again, study participants typically guessed the situation in accordance with what they gleaned from the body rather than the face….