Mean and standard deviation of the answers provided by the users on the online questionnaire.

Each question is answered on a scale of 1 to 5 (1 = strongly disagree, 5 = strongly agree). The System Usability Scale (SUS) score (last line of part 2) is obtained by subtracting 1 from the score of each odd-numbered question and subtracting the score of even-numbered from 5. We sum the results obtained for each question and multiply by 2.5 to obtain the final score.