. Author manuscript; available in PMC: 2021 May 1.

Published in final edited form as: Disabil Rehabil Assist Technol. 2019 Mar 25;15(4):421–431. doi: 10.1080/17483107.2019.1587017

Table 2.

Percent change values across iterations for the Digital Memory Notebook (DMN) task categories and questionnaires.

	Percent Change

	From Iterations 2 to 3	From Iterations 3 to 4	From Iterations 4 to 5	From Iterations 2 to 5
DMN Task Categories
Adding Events (to the To-Do List)	⁺76.71%	−31.28%	⁺29.52%	⁺78.45%
Navigating the Interface	⁺71.40%	−79.94%	⁺42.39%	⁺70.36%
Adding Information (to Profile)	⁺15.97%	−21.69%	−2.23%	−4.54%
QUIS Overall Score	⁺16.07%	−24.95%	⁺35.22%	⁺17.79%
Screen	⁺15.11%	−24.38%	⁺41.32%	⁺23.02%
Terminology	⁺18.07%	−4.42%	⁺17.08%	⁺32.12
Learning	⁺15.38%	−22.05%	⁺33.55%	⁺20.12%
System Capabilities	⁺15.08%	−5.83%	⁺6.70%	⁺15.64%
PSSUQ Overall Score	⁺13.77%	−21.89%	⁺31.22%	⁺27.71%
System Usefulness	⁺3.97%	−14.97%	⁺24.18%	⁺16.29%
Information Quality	⁺17.90%	−28.87%	⁺45.81%	⁺42.67%
Interface Quality	⁺19.02%	−26.98%	⁺16.67%	⁺14.31%

Notes: Increases in task completion times are indicated with bold font. QUIS = Questionnaire for User Interaction Satisfaction, PSSUQ = Post-Study System Usability Questionnaire.

⁺

Represents change in the desired direction for each measure.