New research on zebra finches reveals that stress spreads within social groups, even affecting individuals not directly exposed to stressors. Birds in groups with more stressed members showed reduced movement and changes in social behavior, such as fewer social bonds.

A recent study reveals that seniors who are more susceptible to “emotional contagion”—feeling emotions from others—are significantly more likely to experience anxiety or depression. Researchers found that emotional sensitivity, when unmanaged, could increase the risk of psychological distress in seniors by up to tenfold. Emotional contagion, often triggered unconsciously, helps foster empathy but may strain mental health in communal living settings.