The capacity to make a decision may be affected by the following considerations:
The type of decision being made.
Someone with dementia might still be able to choose what kind of clothes to wear, but perhaps not whether to take medicines.
Change over time.
Imagine that Jabar had a severe infection that made him very confused. After this infection is cured, he might be able again to decide whether or not to take the medication.
Can be difficult to assess.
Sometimes it is not clear, in which case there is no other alternative other than to help the person living with dementia make a decision that is in their best interest