Study Examines Face Pareidolia in Everyday Objects and Visual Noise

Humans often perceive faces in everyday objects such as clouds, electrical outlets, and even a grilled cheese sandwich sold for $28,000 in 2004 that resembled the Virgin Mary. This phenomenon, called face pareidolia, involves seeing faces in inanimate objects or patterns of light and shadow.

The brain's design prioritizes quick detection of faces for survival, which can result in identifying faces in non-facial stimuli.

A study published in the journal Royal Society Open Science examined participants' responses to images of everyday objects resembling faces and abstract visual noise with no inherent meaning. Researchers showed these images to participants, who reported seeing faces in 96.7% of the object images and 53.4% of the noise images.

Overall, 90% of participants perceived a face in at least one noise image, particularly when the noise featured symmetry.

Study co-author Prof. Branka Spehar from the University of New South Wales explained that the research tested minimal features, such as two round shapes for eyes and a horizontal line for a mouth, to see if they triggered face perception similar to more detailed objects.

Participants were more likely to identify perceived faces as male in both object and noise images, consistent with prior studies on pareidolia. Spehar noted that the reasons for this gender bias remain unclear.

Prof. David Alais, a psychologist and neuroscientist at the University of Sydney not involved in the study, stated that people commonly see pareidolia images as male, young, and happy. Faces in object images were more often described as happy or surprised, while those in noise were seen as older and angrier.

Spehar suggested that the brain may be primed to detect potential threats in unfamiliar settings, influencing these perceptions.