While scientists are discovering an increasing number of signs that may be indicative of Alzheimer's disease, some are more prevalent than others.

To help family members determine what they are, the Alzheimer's Association has developed a list of some of the most common Alzheimer's signs.

One of thing to look out for is if those affected are becoming more reclusive. The source notes that when people have Alzheimer's they often start to remove themselves from activities they used to enjoy, such as socializing with others.

Another symptom is having depth perception problems. The Association indicates that symptoms of this may be not being able to tell the difference between something that near and far away or having difficulty reading things at close range.

An additional symptom to look out for is not being able to communicate effectively. This may include regularly having trouble finding the right word or telling someone the same story several times, believing that it's the first time they told it.

Other Alzheimer's signs include confusion with time or place, regularly misplacing belongings and routinely making poor decisions.