Abstract
An imbalance between top-down and bottom-up processing on perception (specifically, over-reliance on top-down processing) can lead to anomalous perception, such as illusions. One factor that may be involved in anomalous perception is visual mental imagery, which is the experience of “seeing” with the mind’s eye. There are vast individual differences in self-reported imagery vividness, and more vivid imagery is linked to a more sensory-like experience. We, therefore, hypothesized that susceptibility to anomalous perception is linked to individual imagery vividness. To investigate this, we adopted a paradigm that is known to elicit the perception of faces in pure visual noise (pareidolia). In four experiments, we explored how imagery vividness contributes to this experience under different response instructions and environments. We found strong evidence that people with more vivid imagery were more likely to see faces in the noise, although removing suggestive instructions weakened this relationship. Analyses from the first two experiments led us to explore confidence as another factor in pareidolia proneness. We, therefore, modulated environment noise and added a confidence rating in a novel design. We found strong evidence that pareidolia proneness is correlated with uncertainty about real percepts. Decreasing perceptual ambiguity abolished the relationship between pareidolia proneness and both imagery vividness and confidence. The results cannot be explained by incidental face-like patterns in the noise, individual variations in response bias, perceptual sensitivity, subjective perceptual thresholds, viewing distance, testing environments, motivation, gender, or prosopagnosia. This indicates a critical role of mental imagery vividness and perceptual uncertainty in anomalous perceptual experience.
What This Study Is About
Researchers wanted to know if the "volume" of your mind’s eye—how clearly you can picture things—affects how you see the real world. Specifically, they looked at whether people with vivid mental imagery are more likely to see faces in random patterns, like seeing a "man in the moon."
How They Studied It
The researchers ran four experiments with over 130 participants. They showed people "visual noise"—which looks like the fuzzy black-and-white static on an old TV screen—and asked them to press a button if they saw a face.
Participants also took a test called the VVIQ to measure their mental imagery (the ability to picture things in your mind). While the study looked at the whole spectrum of imagery, it helps us understand aphantasia—the condition where people have no mind's eye at all and cannot visualize anything.
What They Found
The study found that people with very vivid mental imagery were much more likely to "see" faces in the static that weren't actually there.
Think of your brain like a movie projector. For people with vivid imagery, their internal projector is so strong that it sometimes "beams" images onto the real world, especially when what they are looking at is blurry or confusing. People with weaker imagery (closer to the aphantasia end of the scale) were less likely to be "tricked" by the noise because their brains weren't projecting those internal images as strongly.
What This Might Mean
This suggests that aphantasia might actually provide a more "accurate" view of the world in certain situations. Because people with aphantasia don't have a strong internal projector, they may rely more on exactly what their eyes are seeing rather than what their mind *expects* to see.
However, we have to be careful: this study was done in a controlled lab with computer static. We can't say for sure yet how this affects daily life, and the study didn't have a large group of people who identify specifically as having total aphantasia.
One Interesting Detail
The researchers found that the "mind's eye" only started tricking people when the static was messy and confusing. When the images were clearer, the vivid visualizers stopped seeing fake faces! It shows that our imagination mostly steps in to "fill in the blanks" when the real world is a bit fuzzy.