Abstract
In this paper we propose a portable robot quot Tech Tech quot that inspires elderly people to walk Walk is preferable to maintain their healthy condition both physically and mentally The human ndash robot interaction is important for increasing their motivation Tech Tech talks to elderly people based on the data from various sensors Tech Tech can judge weather and indoor ndash outdoor environments It can also count steps We took a stochastic approach in order to determine the actions of the robot The robot could produce preferable impressions such as ldquo interesting rdquo ldquo friendly rdquo and ldquo satisfactory rdquo Experimental results demonstrate that the elderly people prefer long intervals in conversations and affirmative responses
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