Usability Of Mobile Applications

I found a very interesting paper on the evaluation of the user experience and UI (the usability) of the prototype of a mobile web energy monitoring system:

Evaluating on User Experience and User Interface (UX/UI) of EnerTrApp a Mobile Web Energy Monitoring System
By: Kristine Mae P. Escanillan-Galera, Cenie M.Vilela-Malabanan
https://www.sciencedirect.com/science/article/pii/S1877050919319477

The design of the study is interesting. The researchers looked at usability metrics: (1) efficiency (whether the system was efficient), (2) effectiveness (whether the system was effective), and (3) satisfaction (whether the system was satisfying based on the overall user experience). Selection of these metrics were based on the ISO 9241-11:2018. Usability testing was conducted in the computer laboratory of a private college institute. Apparently, in the past, most mobile device evaluations were done in laboratory settings.

Usability testing of mobile applications is an interesting area. I actually found a paper on this topic from a former professor at UMBC:

Challenges, Methodologies, and Issues in the Usability Testing of Mobile Applications
By: Dongsong Zhang & Boonlit Adipat
https://www.tandfonline.com/doi/abs/10.1207/s15327590ijhc1803_3?src=recsys

I did not want to believe it! I remember Dr. Dongsong Zhang.
One of his research areas is actually mobile HCI (Human-Computer Interaction).
His website at UNCC: https://belkcollegeofbusiness.charlotte.edu/dzhang15/.