Abstract
A series of experiments related to input operation necessary for using an electronic diary system (button operation, text input, and memory recall) were conducted among 13 persons with dementia (Alzheimer's disease). As a result, decline of cognitive function due to Alzheimer's disease made it difficult to conduct a series of tasks and if the decline was mild, participants were able to conduct the tasks. In addition, in order to examine interface design suitable for persons with mild dementia and cognitive impairment, experiments concerning text input and memory recall was conducted among 20 elder persons. As a result, text input using hiragana keyboard was suitable for people with decline of attentional function. Also, it was suggested from the result that sequential information presentation, in other words limiting information and making instructions concluded in one screen, could promote recall of memory.
