Social Anxiety Heightens Brain Response to Conflicting Cues

A University of Michigan investigation led by postdoctoral fellow Irene Melani examined how people with varying levels of social anxiety respond in the brain to mismatched social cues. Participants watched a face look in one direction and then read a word that described a mental state. Those with higher social‑anxiety scores produced a larger N400 response, a brain marker that signals a conflict between expectation and reality. The study used electroencephalography to record brain activity during the task.

The increased N400 was specific to situations where the gaze suggested one emotion while the word suggested another. When participants judged unrelated animal stereotypes, the heightened response was absent, indicating that the effect is tied to interpreting others’ mental states rather than to detecting any mismatch.

Impact on Real-World Judgments

Despite the stronger neural reaction, participants with high social anxiety did not perform better when asked to judge the meaning of a gaze. They were neither more accurate nor faster than those with lower anxiety. The authors suggest that the extra cognitive load required to process conflicting information may lead to over‑monitoring or rumination, which could negate any benefit of the heightened sensitivity.

In a related analysis, the team found that the influence of social anxiety on biological risk varied by culture. In Japan, where social norms are strongly enforced, higher social anxiety predicted lower health risk, whereas in the United States, with more relaxed norms, no such pattern emerged. These results hint that the consequences of heightened sensitivity to social cues depend on the broader social context.