The face pareidolia illusion drives a happy face advantage that is dependent on perceived gender.

The happy face advantage, the faster recognition of happy than of negative, angry or fearful, emotional expressions, has been reliably found and is modulated by social category cues, such as perceived gender, that is, is larger on female than on male faces. In this study, we tested whether this pattern of results is unique to human faces by investigating whether ambient examples of face pareidolia can also evoke a happy face advantage that is dependent on perceived gender. "Face pareidolia" describes the illusion of facial structure on inanimate objects, such as a tree trunk or a piece of burnt toast. While it has been shown that these illusory faces have expressions that can be recognized by participants, it is unknown whether they drive the same behavioral biases as real facial expressions. Thus, we measured the speed and accuracy with which the expressions of illusory faces that are perceived as female or male are recognized as happy or angry. We found a robust happy face advantage for illusory faces that were rated as more feminine in appearance. Concomitantly, we also found a robust angry face advantage for illusory faces that were rated as more masculine in appearance. Taken together, these findings demonstrate that illusory faces confer the same behavioral advantages as human faces. They also suggest that both perceived emotion and perceived gender are powerful socioevaluative dimensions that are extracted from visual stimuli that merely resemble human faces. (PsycInfo Database Record (c) 2024 APA, all rights reserved).