. Author manuscript; available in PMC: 2019 Jun 25.

Published in final edited form as: Hum Asp IT Aged Popul (2015). 2015 Jul 21;9194:488–499. doi: 10.1007/978-3-319-20913-5_45

Table 1.

Mean Percentage of Errors (Standard Deviation)

Error	60–69 yrs	70–79 yrs

Initial Errors
Wrong button	9% (.08)	18% (.14)
Could not locate button	2% (.04)	4% (.04)
Button not completely triggered	11% (.05)	13% (.04)
No action	10% (.06)	9% (.05)
Out of range of sensor	3% (.04)	2% (.02)
Participant had issues	56% (.26)	50% (.22)
After-Hint Errors
Wrong button	2% (.04)	3% (.04)
Could not locate button	1% (.02)	1% (.02)
Button not completely triggered	3% (.03)	5% (.04)
No action	0 (.01)	1% (.01)
Out of range of sensor	2% (.02)	0
Participant had issues	26% (.23)	24% (.23)