HOW DOES INFORMAL CARER FEEL / EXPERIENCE ABOUT THE CARE THEY GIVE TO A DEMENTIA FAMILIES?

Please this has to be in form of interview or questionnaire research. Kindly use some of the most relevant with my materials. Also I will appreciate it if all the reference has to be academic websites, journals in particular.
TASKS
One of the five models that fits in the research.

The type of method and the methodology use
EPISTEMOLOGY must be included
THEORY: Interpretivism fits in for this research
Ethical issues: must be put into consideration