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Table 3 Thinking Aloud test results among participants (n = 5)

From: Usability and preliminary effectiveness of an app-based physical activity and education program for people with hip or knee osteoarthritis – a pilot randomized controlled trial

No

Tasks

Average time (range) in sec

Navigation

 1

Navigate to the home screen

6 (3 to 10)

 2

Navigate to “About this app”

8 (3 to 11)

 3

Activate a reminder for performing the exercises and physical activities. Make sure that you also receive a notification about it

92 (30 to 280)

Performance

 4

Create a training program and set a goal for a physical activity

109 (37 to 154)

 5

Set the amount of series and repetitions of the first exercise

50 (16 to 88)

 6

Set a reminder to perform the exercises and determine on which days you would like to perform them

28 (18 to 35)

 7

Watch the video of the first exercise

22 (10 to 47)

Search for/collect information

 8

Search for information regarding a healthy body weight and osteoarthritis

27 (13 to 58)

 9

Search for information on the influence of stress on osteoarthritis

13 (4 to 25)

 10

Start the information video for week 2

51 (10 to 103)