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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Scenes of the first field experiment. (a) A staff member of this study explaining the interaction process to a participating older adult. (b) Three staff members assisting a participating older adult to use the interactive device.