LearningRx reviews the use of Greebles to detect Alzheimer’s earlier
A study of people age 40 to 60 found that those were at a higher risk of Alzheimer’s (due to having at least one biological parent with the disease) had a decreased ability to identify the differences in Greebles in which one image was slightly different than the other three.
http://www.medicalnewstoday.com/releases/316933.php