E-learning app Usability test (Subjective study)

The subjective test
When the satisfaction questionnaire was used, participants were asked to rate the 64 items related to the interface design of educational apps with a 5-point Likert scale that range from 1 for Not at all true,2 for Not very true,3 for Somewhat True, 4 for True to 5 For Very True. And In accordance with the SUMI measuring criteria, each point weighs Zero for not true at all, 1 point for Not very true, 2 points for somewhat true, 3 points for True and 4 points for Very true.
The questionnaire design ensured that the research findings thereof were converted from the subjective qualitative nature to quantitative data through coding using a five-point Likert scale and then analyzed using statistical package for social scientists (SPSS)