“…Dementia patients may exhibit behavior such as agitation, anger, and aberrant motor activity that challenges caregivers, leading to caregiver burden and subsequent placement in a nursing home or a psychiatric hospital for patients with dementia in severe cases. We have suggested that favorable positive emotions should be an important goal for the treatment of negative emotions of behavioral psychological symptoms of dementia (BPSD) (Fujii et al 2019). In contrast to negative emotional status of BPSD, positive emotional status such as exchanging greetings appropriately, exhibiting facial expressiveness, showing interested in something, carrying on a conversation, and showing delight in something are defined as favorable emotions, which is assessed with the Delightful Emotional Index (DEI) (Fujii et al 2019).…”