Table 1.

Usability and perceived usefulness scores for all participants (n = 30). SD indicates the standard deviation, and IQR indicates the interquartile range. All items were measured on a 7-point scale, where 1 = strongly disagree, 2 = moderately disagree, 3 = somewhat disagree, 4 = neutral (neither disagree nor agree), 5 = somewhat agree, 6 = moderately agree, and 7 = strongly agree. Usability scores were adjusted using linear regression to match the System Usability Scale (SUS)

Item text	Points on a 7-point Likert Scale
	Mean	SD	Median	IQR
Perceived usability (UMUX-Lite)
The exoskeleton’s capabilities meet my requirements.	4.5	1.3	5.0	4.0–5.0
The exoskeleton is easy to use.	5.6	1.2	6.0	5.0–6.0
Overall usability (SUS score)	66.4	11.0	66.2	60.8–71.7
Perceived usefulness (PU)
Using the system improves my performance in my job.	4.4	1.2	4.5	4.0–5.0
Using the system in my job increases my productivity.	4.3	1.2	4.0	4.0–5.0
Using the system enhances my effectiveness in my job.	4.1	1.4	4.0	3.0–5.0
I find the system to be useful in my job.	4.7	1.7	5.0	3.3–6.0
Overall perceived usefulness	4.4	1.2	4.5	3.5–5.0