Details are, I am not even slightly dementia ridden and I could pass some of the tests they give residents as I could not draw three dimensional objects and could not repeat words given to me before a 10 minute conversation ensued in a reverse order. Also mom has hearing and vision problems they ignore.
In her facility I have have been lied to by the people who are considered the dementia experts. They tell me things and then tell my family they never said them, however I have witnesses. Be Careful!
They think that their activities whether the resident likes them or not are more important. If the resident asks you to come, then go. Any time you have that you can be with your family member is important, so later you don't regret not enjoying the resident's wonderful company while you could. We will all miss them them when they are gone so, now is the time to have time with them!