Think you can text and drive just fine? New research confirms that our brain can only concentrate on one thing at a time. When we are busy with something that requires the use of sight, the brain reduces hearing to make it easy for us. This is the conclusion of a study conducted by researchers from Linköping University in collaboration with others. The results give researchers a deeper understanding of what happens in the brain when we concentrate on something. "The brain is really clever, and helps us to concentrate on what we need to do. At the same time, it screens out distractions that are extraneous to the task. But the brain can't cope with too many tasks: only one sense at a time can perform at its peak. This is why it's not a good idea to talk on the phone while driving," says Jerker Rönnberg of Linköping University, professor of psychology with a focus on disability research. He and his colleagues have investigated what happens in our brains when we are occupied by a visual