Imagine your brain as a busy office that needs to switch between different rooms to focus on tasks. This study asked if the speed of those switches changes when you are stressed, and if that affects how well you think. Researchers looked at 39 healthy people, 27 with other psychiatric issues, and 39 people with schizophrenia spectrum disorders. They used special brain scans and heart rate monitors to watch these switches while the participants rested and focused on attention tasks. They did not give anyone any new medicine for this study.
The results showed that people with other psychiatric conditions switched their brain networks faster than those with schizophrenia. However, the most important finding involved stress. In healthy people, higher stress levels changed how well brain switching linked to thinking performance. But in people with schizophrenia, stress did not change that link at all. This suggests something different is happening in their brains regarding how stress and thinking connect.