The Medusa Effect Revisited

The Medusa effect refers to the cognitive phenomenon in which individuals depicted directly in a photograph (Level 1; L1) are judged as possessing more mind than individuals depicted within a photograph embedded inside another photograph (Level 2; L2). Although the Medusa effect has been replicated in several studies, a number of issues still remain to be addressed. One concerns the measurement scale used for mind perception, and another concerns the size of the face and body of the person depicted in the stimulus images. The present study addressed these unresolved issues across three experiments. Experiment 1 examined whether the Medusa effect could be replicated using the 18 concrete mental capacity items derived from Gray et al. (2007). Results showed that L1 targets were judged as possessing greater mental capacities than L2 targets across several capacities, particularly Agency-related capacities. Experiment 2 tested whether this effect would persist when L1 and L2 targets were presented at equal displayed sizes. Under size-controlled conditions, the Medusa effect was not observed. Experiment 3 independently manipulated target size and hierarchical frame cues. Presentation size showed significant main effects across multiple mental capacity judgments, whereas frame presence showed no reliable main effects. Together, these findings suggest that stimulus size contributes substantially to previously reported Medusa effect when mind perception is assessed using concrete mental capacity items.