*6.5. Dialogue Contents*

The number of questions we created was 55, which enabled a dialogue to run for approximately 27 min because it required approximately 30 s in the cycle for the robot to ask a question, receive an answer from the user, and respond to the answer. The details are shown in Table 3. The questions, backchannels, and comments were created by an expert in robot speech creation and elderly care.


**Table 3.** A part of the questions we prepared for the trial.

#### *6.6. Measurements*

We measured the following values: word error rate (WER), dialogue time, user utterance time, and subjective impressions of the participant and caregiver.
