Evaluation of a companion robot based on field tests with single older adults in their homes.

The growing number of older adults places insurmountable load on family members and professional caregivers. Assistive technology with the aid of robots can present a possible solution. The goal of this article was to test a companion robot supporting older adults in their home environments. Eight senior volunteers were involved in the field test. They all lived alone and were self-supporting. The robot was capable of providing cognitive assistance to manage the user's daily routine. Each participant used the robot for 94.9 ± 19.6 days. The primary communication modality was voice communication in their natural language, while the touch screen display was also available for interaction with the robot. The assistance given in daily living was evaluated by subjective (the user's opinion) and objective (logged data) criteria. The most useful and the least reliable robot functions according to the users were the navigation and the verbal communication. Entertainment, locomotion, and weather forecast were the most frequently used functions, while the shopping list was the least popular. The companion robot used in the test was accepted enthusiastically by the senior subjects. Specific robot functions (mainly navigation in the apartment and the speech recognition) require improvement to better accommodate real circumstances.