Looking at education systems that succeed, the study concludes that spending is important, but not as much as having a culture that is supportive of learning.

BBC: UK education sixth in global ranking

"It is likely to play an important role in learning both how to diagnose and treat the disease, but it's still an open question at this point for asymptomatic people, " said Dr. Park, a behavioral and brain-sciences professor who uses Amyvid in her research on aging of healthy older adults.

WSJ: FDA Approves Alzheimer's Test Developed by Eli Lilly