Alzheimer's disease and related dementias can cause a person to act in different and unpredictable ways. Some individuals with Alzheimer's become anxious or aggressive. Others repeat certain questions and gestures. Many misinterpret what they see or hear.

These types of reactions can lead to misunderstanding, frustration and tension, particularly between the person with dementia and the caregiver. It is important to understand that the person is not acting that way on purpose.