Table 1.

Descriptive summary of responses to all items in the usability and acceptability questionnaire

Questionnaire item	Mean (SD)	Median (range)
1. Overall, I am satisfied with how easy it is to use this device	6.7 (0.7)	7 (4–7)
2. I feel comfortable using this device	6.4 (0.7)	7 (5–7)
3. I enjoyed playing the game	6.7 (0.7)	7 (4–7)
4. I think the device is useful in training my memory and attention	6.6 (0.8)	7 (4–7)
5. I will recommend this device to my friends and family	6.5 (0.8)	7 (4–7)
6. Overall, I am satisfied with the interface of the game	6.6 (0.8)	7 (3–7)
7. Overall, I am satisfied with the whole system	6.6 (0.7)	7 (4–7)

Abbreviation: SD, standard deviation.