Memory screenings—those five-minute evaluations given by health care professionals—are becoming more and more popular. While some critics question the validity of such screenings, new tools are making them a more reliable method of detection. That's good news, because proponents say early detection of Alzheimer's and dementia is important in three ways: it enables people to start treatment, thus slowing the progression of symptoms; it helps people begin the coping process early; and it helps prepare caregivers for what lies ahead. Memory screenings don't diagnose an illness, but they do help identify people who may have symptoms. Talk with your doctor if you've noticed changes in your memory.