Can the NPI Inventory (Neuropsychiatric Inventory Questionnaire-Nursing Homes version by Cummings) be used for estimating the professional disruptiveness of the professional caregivers with regard to the total number of the demented elderly they care for?
Can the researcher ask the professional caregivers questions about their total patient population or just questions about a specific patient? If it is the second, how can we generalize the findings to the total nursing home population?