can you personality become more social out going with alzheimer's

I'm not a geriatric physician, so this is not a scientific answer to your excellent question. However, anecdotal information and observation indicates that the kind of change your mention is not only possible, it can be typical. My expert advisors tell me that as the brain changes with dementias of all kinds (including Alzheimer's) personality surprises are quite common. It certainly was true of my mother as she descended into the opaque fog of multi-infarct dementia. Check out my blog on this website.

 Bob Tell, Author, "Dementia Diary, A Caregiver's Journal."

http://bobtell.com

We once had a resident living in our memory care community who spent much of the day hugging staff, one after another.  She would walk down the hall holding hands with a caregiver, give visitors a hug, and was generally a person who loved the physical contact.  My heart ached for her daughter who came in to my office one day and told me, in tears, that her mother had never once hugged her or told her she loved her during her childhood.  She had needed and craved the physical comfort as a child; as an adult, the disease process had caused her mother to become that sort of person - to strangers.  Alzheimer's disease and other diseases causing dementia can be heartbreaking.  It can also bring out aspects of a person's personality you never knew were even there.

The simple answer is, yes. The example you gave is much less likely than the opposite. It is part of the depression that accompanies the disease and is compounded with the feeling of failure as forgetfulness becomes rampant.