I was my late husbands' caregiver the last three years of his life and caring for him was a process of learning for me. I learned that when he repeated himself or asked the same question again, he was not doing it on purpose, he really did not remember. I learned to be patient with him and not get myself upset with his memory loss. I learned that caring for a loved one is not an objective process. I was fully committed to he care.
I realize that working with an elderly person, who is not a loved one, is a different situation, but many of the same principles apply. I would be more objective, but I would have the same sense of wanting the best care for that person.